I found Complete Remedial Solutions to be abysmal and their customer service almost non-existent, it was over 90% just recorded msgs. They did a dreadful job installing insulation in our attic, it was all just chucked about unevenly over the floorboards and left in a right mess. The first thing they did on arrival was to complain and phone their boss whining.
CRS grudgingly agreed to send someone back to correct the horrendous workmanship they did, so after much stress and a half dozen visits it was put right.
Regarding the fans they installed in the bathroom and kitchen, the engineer arrived and told me what was easiest for him to install and wanted to put the fans on both ceilings. I suggested I preferred to have them on the walls, so he complained for the whole rest of the time he was here. I've had to pay someone else £120 to come in this week and finish the job they started and have it done to a decent standard.
The Polish workmen who came to wire the fans were great and there was no complaining nor phoning their boss to moan about every little thing from them.
So my experience with CRS was dreadful, the boss was a very rude know-it-all who kept over-talking me when I eventually spoke to him on the phone and I was glad to see the back of the lot of them.
I felt VERY judged for the fact that I had a government grant to have this work carried out and the overall attitude seemed to be that I should be grateful for what I had no matter how disgusting the workmanship and 'results'. I would never have them to my home again. An absolutely awful and disrespectful company who were my worst nightmare to deal with, avoid, avoid, avoid!!!