Utterly disgusting service!!!!

I have promised to complain none stop until my issue is resolved with Telkom!!!i was told a technician would come to check my device last week and today I get a phone call telling me that no such thing will be done!!!ive had issues with my router for the last 3months were 100gigs gets depleted half way through the month and no one can give me a answer to why this is happening!!!in February my 100gigs was depleted by the 23rd,March was depleted on the 13th,April was depleted on the 9th!!!ive made it clear that I have no more then 3devices connected,only reason I got this router is stream on Netflix and showmax!!!i have never missed payment on this contract but In the last 3months I have not received what I'm paying for in full!!!