Was I just scammed?

I locked myself out of my flat tonight so calles a locksmith. When all was said and done the locksmith wanted to charge £960 for replacing a high security lock. The breakdown was off the top of his head on his phone calculator and he claimed he gave me a “discount” on the lock by £50 since I needed to replace it with the exact same one. When i asked repeatedly for the total before he was done he wasn’t clear except for the price of the lock itself which was £205 if i remember correctly, after discount. I regret not fighting him on it but I don’t know anything about locksmithing and it was off hours (9-10pm) and honestly the whole ordeal was a bit of a shock. Please advise?

Update: I called my bank and because it was a bank transfer they couldn’t do anything about it. So i’m speaking with the police and HMRC and hopefully can get something resolved. Thank y’all for your help and reassurance and suggestions, it really means a lot <3