Poor poor service from Linteg !!!

Extremely poor service !!!My wifi has been acting up for 3weeks now .I have sent emails every week and the last response i got is i must pay call out fee of 450r for a technician to come and change my router ...i mean!!!how does that work,,i have been using this router for barely 4months ,paying 400r monthly and why is it a mission for these guys to just come and fix same way as they were so quick to come and install !!Its not like its my problem the router is not working and i just don't get why im paying a call out fee.If anything Linteg must just come and disconnect their fiber and I'll go for something else