RCT done but Crown not. Or other teeth?

Dear Dentist, RCT was done for my upper chewing tooth number 26. More than a month has passed since RCT done but Crown fixing not done at Balaji Dental College Chennai. I paid Rs.1000 for Ceramic crown to the Dentist in October end, he took the money and did not give any bill. On my asking he gave hand written receipt for Rs.1000. The crown could not be fixed as he was not at Chennai. On asking for proper bill he keeps telling some lame excuse. He said he would give his clinic bill. I refused to it. Now he is telling me he lost the crown so either take new measurement /will refund Rs.1000 to me. I don't know what to do with him? He wasted my time,money and energy. My question is whether not fixing Crown after doing RCT would cause any damage to my gums or other teeth? How long can I postpone crown fixing. Note RCT done on 27th December 16. Already 2 months have passed. Clarify.