MTN poor service

Upgraded my contract as of December 2019. Signed up for a R379 per month deal. The deal came with a phone and 3GB anytime data and 1GB night express, on a Made for Me S. For the first month all was fine. However the next month, my data provided was short by 1GB anytime data. I feel stranded and being cut off from communication.. Secondly the monthly Billing amount changed to R501shockingly. Called the call centre's to assist but not much has happened thus resorted to this forum.

Thank you