Worse experience with MTN data contract

I am not happy with MTN. I signed up 160GB, this month (June) data was not provisioned on my contract SIM card. When I called I was told that indeed the data was not provisioned and that it will be loaded after 48 hours, after 48 hours data was not loaded and I was told that it was provisioned and it could have been depleted. For me this does not make sense and they are not escalating this matter to someone who can assist.