Very Bad service of MTN south Africa

I have a month to month contract with MTN I phoned in to migrate my number from contract to prepaid I spoke to a consultant by the name of chikana he gave me settlement amount which I transferred the money immediately,I was asked to call after 24 hours to check if the money is reflecting,Its has been 2 full weeks straight trying to get hold of MTN retention department.My number is ***.Please help