No after sales service

Order was placed and installation happened very promptly. Then came the after sales service????? My "whatsup" calls were totally ignored. My "whatsup" messages were read but not acknowledged or responded to. It cost me a personal visit to their office to explain my problem and was promised they would come around and fix situation. Waiting for 5 weeks and no response or communication, I have given up on them and have approached an opposition company to come and sort out the problem.