Attitude of Manager

We booked a table of 8 ,treating my mother who is on oxygen 24/7 and don’t leave the house . We got there and manager on the door didn’t even bother to say hello or smile and just asked our name and showed us our table , didn’t bother to walk us to the table .
We sat down .chairs were disgusting dirty that my sister refused to sit on it and we changed the chair ourselves .
Table was very dirty and greasy ( I touched it as I thought it was water trace ) asked one of the team member to give us another table she said there isn’t any .
I went back to manager and explained about chairs and table , he rudely said that he cleaned it himself and it’s clean , I asked him to come and have a look for himself but he replied what do you want me to do about it ? And then walked away and didn’t come back to the door where he was stationed , my family decided to go somewhere else and left . While we were leaving the waitress went to him and said they are living come back outside .
Send an email to the company but no answer .
However we went to a pub nearby castel mynach food was amazing and the owner and his team was so friendly and welcoming .
I would never go back to beefeater . As from my previous experience ,they really not customer focused .