Vodacom refuses assistance or alternatives

Vodacom has problems and there refuse to help me. I'm paying a monthly contract fee and ther is zero reception in my area. Vodacom insured me before I signed that my area is fully 4g and 5g compatible. I barely get any signal now for the last 4 months and the only response from Vodacom is " Sorry for the inconvenience" I can't work from home and my daughter can't study online, but that makes no difference to Vodacom because they get my monthly debit order. This I can't cancel because Vodacom will hand me over to for non payment. They are abusing me because they have all the power and don't care about their clients Vodacom ***