Pathetic service by MTN SME customer care unit

We signed a business express contract in July this year. Since inception of the contract we have attempted via various means to have the contract loaded correctly. The app shows we have night express data but We did not sign a contract with night express data. Visiting your store it was signed and emailing your contact center has not resulted in any success. We have now lost in excess of 100 gig of data because of this Error. MTN small and medium enterprise customer Service is just ignoring our effort to rectify this as they just ignore our emails.