Vodacom does it again...

I've had a Vodacom contract for around 18 years, my wife is with Vodacom also and I have two other number with Vodacom (Data). We are working from home and I'm largely dependent on my phone signal to speak to customers and business partners. I've been at the same address for 8 years and have not had reception issues (otherwise I would have switched long ago)... We have had extremely poor reception as of the last month, even according to coverage map, we are supposed to have LTE/ 3G/ GPRS/ EDGE etc. Clearly there is a fault on the tower, either the module is damaged or there is another technical fault (overloading or capacity etc.), I have logged a complaint, which was opened 15 June already, only to receive a copy and paste message, 2 days later, that they are looking to improve coverage and due to 3rd parties cannot commit to time frames etc. BUT I SHOULD BUY A SIGNAL BOOSTER??????????? You absolute INCOMPETENCE is only exceeded by your ARROGANCE!!!!!!!!!!!! Fix you **** or let me know if I need to find a decent service provider and then you would need to waive any claim to the useless contract I have with you, on all 4 numbers.