Incorrect billing

I migrated my contract to Smart broadband Wireless Lte last year March Contract signed for R799/month all inclusive I am being continuously charged R949 a month 1 year of phone calls to Telkom accounts and Telkom Sales together with emails to *** to have the matter resolved with no joy

Apparently the Sales Consultant, Chanise who signed me up via 10213 is the only one that can rectify the issue but it seems to me that she has disappeared even though requests were logged for her to contact me

Not sure how to resolve this matter Utterly disappointed and frustrated