I am working on my bathroom, we took off the tiles and knocked down a partition wall. When we knocked the wall down the rendering also came off (about 0.3m X 2m) from the wall it was attached to such that you can see the concrete blocks. Also, some of the tile adhesive is still stuck on the wall. Then we have another issue whereby the innerside of the partition was rendered and then multi'ed and the outer side, the guy has slapped the multi straight onto the concrete hence the wall is slightly uneven. What should I do with this wall ?