Torque Converter Replacement

The mechanic there named Terry is a bold faced liar. Quoted me $850 worse case scenario. Had my car for a couple days, gave me a call told me again on this second occasion, $850 for parts/labor & also mentioned a $60 belt that I denied maintenance, to fix only the main problem. (2) days laters Terry tells me it's going to be $1,900. I let him know absolutely no way, so he convinces me, cons me into his front desks pre-approved on the spot loan that I'll be able to pay within a year. Paid him all my money, $1,000 so he "would be able to order parts". Now Terry says my rides ready, but I have to give him a check for $952. So basically Cookson's Transmission City has my car(house right now), my life savings, and most of my personal belongings for $150 over originally quoted on two seperate occasions.