No MTN Fixed LTE service for a month

I moved to new home on 25 Feb 2021. On the 21 May 2021 after changing my details to my new address my Fixed LTE router stop working. I have been to 2 MTN stores and sent several emails to the MTN SME contact centre however no one could help me. Almost a month with no home data.

Now they want to me take out another contract at a higher price. Why should I pay more? I am in a bind because I cant work from home because I don't enough data.

I just want my MTN to sort data problem asap.