Very very angry at **** service

For six months I went through a financial struggle and was unable to to pay my 3 contracts I have with Cell C. I was called 4 times a day to make payments. In June this year I have paid all outstanding amounts, but paid into one account and not 3. Cell C stopped calling but did not distribute the money in into the other 2 accounts and they didn't call me either to let me know of the situation. I am now sitting with open accounts that is in arrears that is effecting my credit score and cell just keep closing my casing saying they have no evidence to pay the accounts or refund me the money. My money has gone missing.