Unacceptable Service

I am fed up with SADV and their lack of service. In my life I have never experienced such bad or rather unprofessional service from their technicians. Come Friday 17hoo our signal starts dipping. Call centre told us White River technicians does not work over weekends. Miraculously the signal appears on Monday morning. During the week we also have no signal after 17h00.We can register as many tickets as we want but nobody will get back to us. This entire weekend we are without wi fi. Please tell me what I must do.