No internet for a week

Our internet account was closed due to non-payment, but we quickly resolved the issue, and the internet was restored. However, it suddenly stopped working again. When we contacted MTN, we were informed that the account was not unsuspended correctly. A service call was logged, and I was assured the issue was resolved. Despite this, we have been without internet since the 20th, and MTN is unable to assist further as they claim they cannot identify the problem.