CELL C PATHETIC CUSTOMER SERVICE!!

Im having issues with their credit department. After upgrading my account in Nov/Dec'18 my account was first combined with my mother inlaw on her debit order, without anybodys permission, then eventually after three months of fighting they split the bill, a double payment which I made in Aug'18 to get my account ahead (I work for myself, so I only pay by the 7th of the month) was lost off of the account. Every time I phone to talk to a manager or supervisor I get told thhey are to busy. Every call center person gives me a different reason why my account is not ahead anymore. They don't want to fix the problem but keep trying to pin tbe fault on me.