Problem

So, I am still within my 90 days. I’ve ran my route about 24 times and my Post office is saying that if I don’t get my route down then they are gonna tell me to kick rocks at my 30 days evaluation. The thing is this, another post office has been wanting my help but my postmaster has been denying it because she says “You need to get my route down.” I have my route down and I do know where people are and which boxes to hit and not to hit. She then listed another problem of mine about not being good at casing. But she has been having someone case it for me and when I’d tell her to let me case it to get good, she won’t let me. I asked the other postmaster if i’m able to transfer and she said that it can’t be done within your 90 days. What can I do here? I want to keep my job but if they are gonna sack me at 30 days and I can’t transfer, what can be done. I have bills to pay and only working 1 day a week isn’t cutting it.

I forgot to clarify at the beginning that i’m an RCA. they told me that when I started that I can have more hours and stuff but they are denying me to get more hours.