cellc suspends my line even though I made payment

I am totally disappointed with Cell C with regards to its service and mismanagement especially after having 5 contracts with them. I was charged a huge fee by them when my debit order didn't go through because I only get funds on the 1st but Cellc debits on the last day of the month. So I make a payment via a cash deposit on the 2nd of February 2016 and email them proof of payment and call them to ensure they've received it and says they will make sure payment reaches all 5 of my numbers. However on Friday the 12th they suspended my account because of non payment so I called in again and they say it seems like payment wasn't allocated to a specific number and they will sort it out until now nothing has been done and my line is still suspended. I have also requested to remove my debit order and begin to pay by cash every month yet there are complications with this as well. I have not had this problem with Mtn and Vodacom. Honestly I can't wait for all my contracts to end so that I may terminate them all. Really disgusted by Cellc they don't even care that I have 5 contracts with them. I also need them to consolidate all my numbers into one account number for an easy deposit.