Consumer Redressal

I had booked a cab from 'TaxiforSure' services on 30th may 2015 for which the bill was wrongly charged as 540 Rs instead of actual bill of 220.Since i was going for exam I paid 540 to driver and raised a complaint regarding same.I had got email for the bill of 220.I had been taking followup since last one month.Everytime they are saying that it is in process,our concerned team will call in half hour but never got any response from them.They use to assure me everytime that next day the refund will be made.But till now i had not recieved any refund .It is very irritating and the company is not taking any step to resolve the issue.I had all the proofs and call recordings of their executives who guaranteed to solve the issue very next day and thus mentally harassing me.