poor product, poor customer service

My first experiences with Proport were very pleasant, especially the salesperson SP. But soon after they finished building our new room it became obvious the plaster work was of a very inferior quality. I had to source another supplier to fix up the job on the inside, as they blamed the poor finish on the type of sand. After much struggle, they agreed to reimburse the cost of fixing the interior finishing. The outside plaster work is still shoddy, but i have semi accepted that's the way it's going to have to remain. Then after a few months our newly built roof started to leak, and after many weeks of trying to get Proport to have a look and fix, they finally did, with no mention of how they propose to repair the paint job on the walls. Another few months later after some heavy rains, the room started to leak from the balcony. I have messaged Proport of the issue (with pictures) and gotten confirmation of receipt, but they have not gotten back to me with any word. Overall, i am very unhappy with what seems to be a poor job and accountability after being so optimistic after my first meeting with SP.