Poor Poor Service from Intec missing payments on my statement

INTEC Collage has no customer service. i have been trying to get a issue resolved. This is how this is busy unfolding.

i am currently under debt review so i receive my statements from debt rescue every month. this month i received my Intec statement i then picked up that Intec received payment last in Feb 2019 were its now Jul 2019. i then called Intec to confirm the last payment that they got and told me that is was indeed in Feb 2019, then told me not to worry they know that i am under debt review and that the payment will be made. but on my debt statement payments have been make every month. I called debt rescue, they told me all payments have been made as per the agreements. Debt rescue then send me all the payments on the account. when i looked closely to both statements i picked up that from 2016 here and there is payments that is missing on my Intec statement. they told me that debt rescue changed ref numbers but they never did the told me that they get a once off amount from debt review monthly an that is were the problem was. i do not know! my amount was outstanding of +-R1500 but only to find out that Intec needs to pay me R1303 that i have been overpaying. but it have not been an easy road to get here if you call Intec they transfer you to every department i think i even go transferred to security at the gate i have spend more that 4 hours on the phone and endless emails. i found an employee that started to assist me but i need to call everyday to an update but most of the time the person is not available . today the is been from 2 weeks now and the issue has still not been resolved. i feel that Intec was steeling from me if it was a finger issues that person that is working with this needs more training. i am not happy with customer service i think intec must re look at their customer service mission statement. i called again today it took me 20min to get hold of the correct person i then told me that this is day one of the request for my refund. WOW super service World class!!