What proof is there that they are ignoring you specifically because of not pledging? If there is no proof, then you are also assuming things without being up front, and judging them without cause.
If there is no proof (such as you have not asked them directly and specifically and they answer to the affirmative), then maybe give them the benefit of the doubt and assume they have a lot going on that is causing them stress, such as financial stress due to their own falling short in finances, as is often the case in small churches.
And how do you know they are actually ignoring you? Have they physically turned away from you when you step in front of them to say hello, or do you think they are ignoring you because they never called to see how your trip went? And no, pastors are not responsible to call you and see how your trip went or that you are okay. Never wait for someone else to take the initiative when you can take it yourself... maybe they are waiting for you to decide when to talk about it, or to find out how they are managing....
Pastors are not an endless wellspring of support, outreach and knowing what's going on with everything from finances to the nuances of congregants' personal and professional lives. In fact, most pastors do not get enough support from the congregants, and end up having nothing left to give....
One thing the Bible makes clear: If you know your brother has something against you, it is up to you to go and reconcile. And if you have something against your brother, it is also up to you to go reconcile. Either way, the Bible is telling you to take the initiative to reconcile... that's emulating Christ.