Bad service and double debit order

Firstly i got 3 cell phone contracts which 1 is with cell c on number *** which is due for an upgrade i called in to do a upgrade and querie the double payment that went off previous month but the lady said no i need tho clear the debt review first which in my opinion.is bull **** as i could upgrade at vodacom and mtn with no hassle. I.left the debt review company dc partner in.2017 already after i realise that they did not pay all my creditora but they send statements that it paid every month, then i called them and cancel also lodge a complaint at NCR but with no luck now this still show or refkect.bad on my name due to a company that took my miney whothout paying my creditors. I made arangements with them and paid them i am left with 2 at the.moment the 1 at std bank i also find.out they did not pay them and they cant.proof the payments even the bamk.can.mot profide tbe proof so still paying that off since 2015 which i think is not fair. Now cell c which i pay each month never.skipped a payment which did not even had a aggreement on the debt review with tell me i csn not upgrade, your company was mor on the court order for aggreement to pay of onlyy creditors was and aggreed so how can you decide not to upgrade if there is debit order in place for many years and never ever.skipped a payment? But you can take double payment from.my bank without any complaint or conformation so can.you please tell.me how? If i am on debt review i can not pay the account? Did i pay? From the start without any hazzle? If the other cell contracts i have can upgrade me whhy can cell c not ??? So not good service at all and will cancel my contract and i want refund onthe the 2 payments that was made of R218 on 31 july and again on 2 august please urgently dont call on the 084 number i gavr the sim to my.mother call me *** if you got a problem