Billing department/Payment issue with my contracts: I'm extremely disappointed!!!!

<p>I had two contracts with MTN and the other one expired in April 2016 and the last invoice was in May 2016 which was R447 and the other one which is still in contract was R353. I made a payment of R800 (for the both numbers) via internet banking on the 25th of May 2016 on your ABSA account ********** 150. However I might have forgotten to add my cellphone number as reference and instead wrote May 2016 invoice. Days following this (on the 30th of May 2016, i believe), I got sms's saying i need to make a payment of R353 by the 3rd of June 2016, I contacted your customer service centre and advised of the payment I had already made on the 25th for both my numb ers including the R353 I just received an sms for. I was advised to send an email with the POP to ********** to which I did. On the 6th of June I received yet another SMS about the R353 outstanding and that my line will be suspended if not paid within the next 2days, I re-sent the same email with the Proof of Payment to the same email address and I contacted your customer service centre again and explained the latter. I have sent queries even via your website regarding this and I still have not received a response/ confirmation regarding this amount. On the 13th of June I contacted your centre again and explained everything to the agent, to which he advised that I send the Proof of payment to his mtn email address and he will forward it to the Billing department, he advised that he will give me a confirmation as soon as my email is received, to which he never did and I sent him an email to confirm if my email was received and I have had no response till this day. Today, 17 June 2016 I received yet anothet SMS stating that my account is overdue and that R800 needs to be paid into your ABSA account to avoid suspension in 2 days. I contacted your center immediately after I received the sms and once again explained the dreadful story of me having already paid R800 for end MAY 2016 on the 25th of May and that I have sent correspondences via email (since it seems to be the only way) for the past two weeks and still nothing seems to have come out of it. He advised that a query was sent to the billing department on the 13th of June( referring to the phone call I had with your employee, who asked me to send the POP). This guy advised that they usually respond 2 days after receiving the query and that I would have been contacted regarding the matter but nothing has happened thus far. And now I just learned that I will have to pay more than R1000 this month i.e the June invoice for my 081 number and the R800 from last month, which I have been going back and forth about because I made the payment and money went off my account and I also tripple checked the account number just to be sure and all seems to be correct. My line has not been suspended in all the times that I was told it would be, however I'm more concerned about monies I'm expected to pay when I have gone out of my way to clarify the situation and sent proof of payment numerous times in different platforms. I am highly dissapointed with the way this has been handled in the +-2 weeks that I have been dealing with this and the fact that I received another sms this morning indicating that I stiil have to pay this amount just clearly shows how *********** your services are. What are your "query" platforms there for If we cannot be assisted with them? or at least even get a confirmation that it has been received and the matter is being looked into etc. I have had to do more work trying to get this sorted, provided all that was needed and I still find myself chasing after your feedback.</p>