Vodacom is not good to their customers and service is poor

Vodacom has been a headache since 22/03/2022, i have no coverage, i asked them to cancel my contract since i am not getting what i am paying for, instead when i called the customer care they offered me a router saying"its going to make my coverage better " the router didnt make a difference and now they have increased the contract term without my concerns and also the contract price . I am a student and trust me having to upload assignments is a headache .last year i missed an assignment because i couldnt get coverage .. on a good say it tests 1mb/s . Every month i feel like i am throwing money in the dustbin .. i am really not enjoying their service