CALLING AND CALLING AND CALLING

Been calling MTN today 3 times. Each separate occasion I get cut off after about 40 mins of holding to speak to a agent. THIS IS UNACCEPTABLE!!! WORST IS, I am calling to phoning to follow up on a enquiry. <br> <br> I received a invoice for R1900 for last month. Which is impossible since my contract is average R650 per month. I did not receive any messages stating my data usage was depleted like every other month. And my contract has never gone into negative data usage since I took it out. Even when the data was finished. When enquiring the agent stated my contract is not capped. Then logically why have I NEVER gone over the limit if I have used up my data before? There were other amounts on the invoice which didn't make sense either. Things like International calls etc. I requested a data usage report on the 25/06. I was promised to receive it within 24/48hrs. Never received it. Phoned back (17/07), that agent escalated it, still didn't receive it. Phoned again now, apparently request had been resolved. Still don't have report, and previous agents didn't escalate like I was informed. I have 3 Ref numbers, NO solution,NO feedback,NO resolution. <br> Honestly the worst service I have ever had.