Please could people advise.
We are having a loft extension which means moving a tank etc. The loft company plumber had to drain down the system. Afterwards in two of our bathrooms we had water leaking back into the toilet bowl which was probably due to limescale on the old parts inside the cistern so we needed to get them repaired.
Eventually we called in a plumber we have used before. He is expensive but reliable.
He drained down the system and replaced the parts plus some other valves etc that needed changing. Then the issue. When he filled the tank he couldn't get the cold water running again. This was Friday. So he eventually gets it going by late afternoon and leaves. By Friday late evening it had stopped again. He the came back on Monday. Eventually got it going and then the hot water stopped. By the time that was fixed it was Monday late afternoon.
He sent us the bill today and it was £150 parts and £850 labour.
I honestly don't think this is reasonable and have questioned him. He is blaming the loft plumber for leaving debris in the system for causing the inability to get the water running again. He is also saying if we don't pay in fill he will come over and remove his parts.
Can I have people's thoughts please?
Ps this is in Berkshire.