Bad signal reported

I have 4 contracts with Vodacom. We stay in this house for 12 years. The signal is getting worse everyday. Phoned Vodacom twice for help. We struggle with Internet and can't talk on the phone . Many times a call end 5 - 7 times. Vodacom ask for more numbers that struggle as well. I emailed them 30 nr of people around us that have problems. My husband need signal to do work. What a frustration!!!!!!