Vodacom is a mess

Here is my horrifying story...I have been using Vodacom home lte for more than 3 years now,started with 20mbps then 2 months ago upgraded to 30mbps.There was never any concerning issues with the 20mbps but after 3 weeks with 30mbps the speed dropped to almost being unusable and switches off frequently.i mafe numerous phone calls and after 2 weeks a technician phone me and tells me there is no 4g coverage in my area and the upgrade should not of been approved.He offered me free cancelation or i can phone online department and ask for a swap to 5G contract.Assuring me that if the swap could not happen i can still get the free cancelation as the fault is the non 4G coverage.I phoned online sales and was told the swap cant happen and that i will pay premature cancellation fees.After explaining everything to every department i was reffered to still no resolution and my phone number was blocked because i phoned them too much.so another obstacle was handed to me.It is now 3 weeks of having a useless router and nobody can seem to help sort out this mess