Tmobile cannot port a number from Verizon into their system

I have had 2 lines with tmobile for almost 20 years. I attempted to add a third line and port a number over from Verizon. We are going on 48 hours and the response so far is that there is an issue with tmobile system letting the number come over to tmobil. Tmobile is telling me that Verizon has released the number and it is the tmobile system issue. I get periodic call backs saying that a ticket has been entered and to wait ANOTHER 24 hours. T-mobile is about to loose me as a customer.