Boost cell phone suspended "after I paid my bill"

My name is James Gibson, boost phone numbee 631-394-1722.  I have been with Boost Mobile for many years.  I paid my monthly bill and when I went to make a phone call it wouldn't go through. I called customer service an they said my account was suspended.  They gave me a reason saying my phone was suspended for using it too much  then they said there was suspicious activity but wouldn't  tell me what that meant.  I asked for a refund of my $50 payment and they refused.  I am requesting a refund of $50 since I cannot use the phone.  Also. Your customer  service department were rude and of no help.  I have since gone to TMobile.  I expect a refund immediately, if I do not receive it within 7 days, I am reporting this to the better business bureau. Please contact me at the above phone number upon receipt  of this complaint.