Pathetic service

I app**** for fiber through vuma and britrlink begining of june my money was paid for the first month the installer came to installer came to do the installation but requested for r450 for extra cable which i was unaware about , the installation did not occur but my line was activated i requested mweb to cancel the line but they blocked my profile terisa took my number without authorisation and sent me a message stating that the installer will come through today at 2pm however she has being ignoring my messages and futher she states that i should call the office with my airtime i want this line cancelled imneduately so i can use a different isp because the service with mweb and britelink is pathetic and i also want a refund for the funds i already paid