Data dssapearing when not even connected to MTN data

Just watched my data dissapear- yet 1) I am at home connectd on wireless to my fibre 2) Even when no connected via wireless I use afrihost for data...

Of course contacting MTN is worthless- 135 does not give the option to talk to a customer representative regardless of how many menus you work your way through. I cannot wait for my contract to come to an end so i can cancel!