Mary is dead and so is every saint who ever lived. You can choose to believe the Catholic church or the scriptures - your choice. If the Scripture is not enough proof for you then you can keep doing what you do. Although the spirits of the saints are in heaven there is not one account in all of the Bible that God used the spirits of the dead to communicate with those still alive on earth. When King Saul did this with the witch of Endor he was condemned. You risk doing the same thing but again that's your choice. The burden is on you to scripturally prove otherwise.
Sola Scriptura is your limitation, not mine.
Have you ever done any research into the apparitions of Mary and what was told to us? Or the outcomes of said apparitions? If not, I highly suggest you do.
So clearly you do not believe in the communion of saints, and that those of us who die in Christ are alive in heaven, and how the saints in heaven offer up prayers to God on our behalf as shown in Revelations.
That...honestly is sad. Mary and the Saints are dead by earthly standards, not by God's standards, and honestly I think His standards win here. We are told that we will be alive in Heaven, so that right there goes against your stance, that they are dead.
I don't need to provide some arbitrary verse from scripture that is plucked out to "prove my stance."
The proof, is in the event. We are told to test the spirits, but also not to question the Holy Spirit. So then how do we test the spirits? Easily, what do they say?
The apparition of Our Lady of Guadalupe, occurred in 1531. Mary identified herself as "mother of the very true deity" and asked for a church to be built at the site in her honor. Originally, the bishop did not believe this was true and asked for a sign. Saint Juan Deigo was visited by Mary a total of 4 times, the 4th time being the most significant.
Juan's uncle had fallen ill, and Juan left to get a priest. He changed his route to purposely miss meeting Mary at the appointed time and place, yet Mary still met him on the road. Juan then explained why he did not go to the appointed place, to which Mary responded "Am I not here? I who am your mother?". She then instructed Juan to go towards this hill, which is normally barren, to collect roses and bring them to the bishop. On the hill, in the middle of December, Juan found Castilian Roses which are not native to Mexico. Mary placed the roses into his cloak and told him to take them to the bishop as a sign. When Juan got there and dropped the roses, a large imprint of the Virgin Mary appeared on his cloak. Juan's uncle was also cured completely the next day.
More on it here:
Our Lady of Guadalupe - Wikipedia
Next is Our Lady of Laus, which occurred between the years 1664 and 1718. Mary appeared to Benoite Rencurel, a young shepherdess and instructed her to rebuild a rubbled Chapel into a new Chapel. "It is my desire that a new chapel be built here in honour of my beloved Son.It will become a place of conversion for numerous sinners and I shall appear here very often”
Mary's message was for sinners to do penance, the chapel built so that Jesus would convert numerous sinners, and a house for priests to be able to administer the sacraments to sinners.
Another one is Our Lady of La Sallette, in 1846. Mary appeared to two children. Mary's message was for people to respect the repose of the seventh day and to respect the name of God. She wished for the conversion of all human kind to Christ.
She also warned of a punishment in the form of rotten potatoes. This warning is a few months prior to the Great Potato Famine of Ireland and a potato shortage in the rest of Europe during the winter of 1846-1847.
This is only to name a few. Now, if you wish to read more, here is the link:
Marian apparition - Wikipedia
I am of course also going only off the list of apparitions approved by the Catholic Church.