Pathetic Service !!!

On 27/03/2016 I paid R1200 into cell c account and I kept on calling to confirm if they received the payment, finally after 5 days they were able to see my payment and I sent a proof of payment. I had 2 contracts with cells and when I made the payment I used the 079number as ref and the contract for 079 number was meant to end in May 16 and the 076 number will end in Aug 16. So I called to request for the payment I made to be allocated to both numbers and they took R500 and odd cents allocated on the 079 and R300 odd to the 076. Now I cancelled the 079 on 08/04/2016 as it was ending next month and didn't want to upgrade and it was cancelled but now I only owed R287.98 for the 079 num and there is a credit due to be, I called in today to request for the money to be allocated to the 076num but their clueless consultants kept on taking me back and fourth. I spoke to about 6Consultants and none of them could assist. no one has phoned me since a cancelled the one contract to confirm how much is due to me since I paid more than what I owed. Apparently they all cant help me since the 079 num is now on prepaid. So where does that leave me? Whats gonna happen to my money?