WORST SERVICE FROM VODACOM

I have been living at my address for 4 years now and I never had any issue with Vodacom LTE speeds! and since 3 months ago I started having very bad speeds and up until now, it's been degraded so badly that I cannot even take a teams call or play online games. because my LTE quality is so ****, i have phoned Vodacom multiple times and also logged multiple service requests, the service request then just gets closed for no reason without resolving the issue the network department guy just told me that he doesn't want to deal with me and then put the phone down. I have wasted money to buy a new LTE router and found out it was again just Vodacom trying to shift the blame because my problems did not go away. i have even now bought a pointing external antenna that helps a little bit but its still very bad ago and I have phoned Vodacom multiple times. Vodacom is ****ing **** and their aftersales service to long standing clients is **** .. wonder what will happen if I phone my bank and cancel that debit order and then use the 2000 rand I give to Vodacom and just get internet from someone else because currently, Vodacom is breaking the contract and not providing a service.