STILL NO REFUND FOR INT ROAMING 7 WEEKS LATER!

I returned home from the UK on 10th April to a R5500 bill which included roaming costs, plus my cell was cut off at Heathrow airport and entire weekend after that. I called the call centre before I left specifically to avoid roaming costs. I was not given the correct advice/information. I have called MTN consistently over the past FORTY SEVEN DAYS!!! The matter is escalated and escalated and escalated again. I was promised that a refund would be made into my account. I am still waiting. I will NEVER so long as I live EVER take out another cell phone contract. Because this is quite frankly UNACCEPTABLE!!