Here are a few of them. Please modify the list by adding/deleting but remember to address the concerns in the “final list” before you make that request.
#10 They are NOT ignoring. Just busy to respond back that they will work on the request
#9 They are busy.
#8 You made an unreasonable request
#7 Your request was unclear
#6 Your request was too “costly” for them to handle
#5 It was unclear “what’s in it for them” to fulfill the request
#4 You have taken them for granted before. They want to set that straight.
#3 Your request was not THOUGHTFUL enough.
#2 You are NOT likeable
#1 You are easy to ignore. BECOME that someone that’s hard to ignore.
All the best!