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Thank you for your reply - New Judge. I have told my insurance company about the incident and have emailed them the appropriate photo took at the time.
However, I have to deal with the neighbour who prepared this extortionate quote as the old lady doesn't want to make any decision on this. All she said to me that her neighbour will do the paperwork and the husband did all the building around her house, hinted her preferable person to do this job. This make things quite complicated in term of negotiating with them.
It seemed to me that whatever I said/will say, they will not interested in any negotiation.
Although my insurance company told me that they require 2 quote fro mthe lady, I have afeeling that she will go with whatever her neighbour told her. This make things quite complicated.