Unsatisfactory conduct of manager

My dissatisfaction is born out of a query resulting from continued deductions made for a account that I have thought have been stopped and cancelled in 2014/15. When I discovered that monies were taken by your company for the stated account, I approached the MTN store at the Oliver Tambo Airport in July 2017 to investigate the matter. Having done that, the manager requested that I complete the necessary paperwork that he would then submit to the relevant department. He was very helpful at the time and assured both my wife and I that it would be dealt with with the necessary urgency and efficiency.

To my surprise, I found that monies were deducted again in August even though I was assured that the matter would be wrapped up by the end of July. As I am living and based in Beijing, China, calling to South Africa is a very expensive and we are not able to connect to their toll-free numbers. A friend from Johannesburg approached the MTN branch in East Rand Mall to investigate my enquiry. They found that the manager of MTN Oliver Tambo has never submitted any paperwork. This matter has dragged until now as monies were deducted AGAIN in September. I eventually got hold of the person under discussion two days ago and he promised to resolve the matter. To date, nothing has been done and he has not given me any feedback. I have made numerous attempts since then to get hold of him but there are ALWAYS reasons given why he is unavailable or the telephone is engaged and upon occasion ignored and even put down in our ears.

Therefore, I want to formally lodge a serious complaint against the manager of MTN Oliver Tambo Airport.