I employed Lee Richardson of 26 Derwent View, Blaydon upon

I employed Lee Richardson of 26 Derwent View, Blaydon upon Tyne, based on his quote of chimney and rendering of £1650, the day after the scaffolding went up he advised it was more work than he previously quoted and advised the new price would be more. I advised I was not going to pay any more as I had given him the job based on his quote which was not the cheapest. I then had 2 more calls off Lee advising he wanted to do the job and show me he was a good trades person and that he would do the whole job for £2000 and he also wanted a good write up on check a trade. I agreed and when he was finished asked for his bank details to put money in his bank, which he said he would email me. He rang again on the 24-12-2014 to thank me for the comment on check a trade, again I asked for bank details he advised he was away with the family but would email me. Well you can imagine my shock on the 26-12-2014 getting an email not of his bank details but a bill for £2900. He called me early on the 27-12-2014, I advised not happy and there were cracks already showing on rendering. He advised coming straight over, when he got here he was full of hell and advised were the crack was he hadn't even touched, but he would come back and fix. He then wanted the £2900, which I advised the original quote was for £1650 and we had agreed price of £2000 on the phone and I would not be paying a penny more, he then started yelling telling me I had problems and he had never had to deal with someone like me before, at which point I took his bank details and entered my home leaving him outside yelling and ringing doorbell and telephone.
I am a female and live on my own and used check a trade as I wanted to find an honest trades person who did a good job, I have had a daily call and text from Lee Richardson asking for £900 which I have not answered but as check a trade on holidays until 02-01-2015 do not know what to do and am afraid to go out.
Thank you Reina Cohen