Vodacom signal disappears

I recently signed a 3 year contract for Vodacom’s 100G LTE package. It has been great until a month ago. Since 5 December 2020 every few days the Vodacom signal in my area disappears. This means no service on my phone and 1 bar of 4G on the LTE modem. I suspect the modem is picking up the 4G from another tower. It is very slow though and I cannot work from home with 3mbps speeds and no service on my cellphone. I have reported this numerous times which is difficult as there doesn’t seem to be a number you can actually contact to report a fault. They say dial 135 but there’s no option to report a fault. Therefore I have been reporting my fault via Facebook. The signal disappears each time anything from 1 hour to 12 hours. Then when the signal returns Vodacom seems to think the problem is solved and close my service ticket. Obviously it’s not fixed if it keeps on disappearing every few days. I understand they have faulting finding steps they need you to work through but it’s frustrating as I’ve done their steps repeatedly everytime I have no signal and it doesn’t help. It’s the same issue everytime. It’s not my devices as is being insinuated. Then it’ll have to be every single person in my areas devices. I need to make important phone calls today and I have video calls to do today as well. None of which I can do. This is highly frustrating and I need this to be fixed once and for all. I’m paying for a service I only get 80% of the time. Then I should only pay for 80% of my account.