Xfinity Mobile Escalation

I want to display my disappointment with customer service and state that with multiple calls there has been no solution and kept with false statements, I had tried the mobile service for a tryout and ended with a nightmare. I had initially called in to cancel my internet service and convinced to try out the xfinity mobile service and it sounded promising however there are the small details that were not disclosed to me that would have made me not go through with the tryout. There is a fee of $25 for not having any other xfinity service and the representative kept that from me knowing that I would no longer have any other xfinity service active, also I was stated with a $750 credit for trading in my old phone and to my surprise credited to only $250 after they had received my phone and I want to mentioned the phone was in excellent condition! The way I was evaded on the phone has me frustrated and bothered that they manage to take a perfectly working phone for a credit that is not valid it's worth, my old phone was worth more than the $250 than the credit provided. I tried to have my old phone returned but according to xfinity they have no control when it's received by Assurion and left with no credit when I am trying to cancel the xfinity mobile service. There is a cancelation fee ($140) if canceled before the 1 year trial and the phone credit for the trade in does no longer apply when you cancel. Last thing I want to mention is that I had asked to remove automatic payment for the last 4 months and I have been told on every call that they had removed it and still here I am with Auto pay still active. Xfinity might have great internet service but customer service has taken a downfall that wastes your time on the phone and goes no where with a resolution or reasonable explanation, the representatives at times do not speak english well and makes the call much difficult to solve your issues with a language barrier.