Airtel — Delay in providing the service

I am kishu kumar customer of airtel .on 30 July I had paid rs 4000 for airtel xtrem fiber new connection with application no[protected] but still they didn't provide me with service.the person who came to take payment and to apply for new connection is not received my phone .and when I email you about my issue you committed that on Saturday your brodband service will be provided or you will get the refund but still I didn't get the service.
So, at last I kindly request you to address my request and proces my refund my money as soon as possible.