Telkom data disappear

Telkom data I have entered into a 80 gig monthly data contract with Telkom middle March 2020 Previously I had a 5 gig contract that enabled me to do my e mails and downloads and trading on JSE With this 40 gig daytime data I can hardly work for one week and data simply disappear. The night time data stay OK BEING DESPERATE to watch my portfolio to make changes, I bought 500 gig data and set the modem on a metered account. After only 9 gig usage the rest of data disappeared during the night It is impossible to contact any Telkom customer care telephone number I have spent hours to try and contact Telkom but no response It is not possible for anyone else to log into my data without my security key number How then is it possible for my daytime data to disappear?? Is someone at Telkom blocking my data or even maybe diverting it?? I think I must cancel this ************* contract but for years I was satisfied with Telkom