Airtel — Reg vodhapone to airtel post paid MNP request

Address:

15, Perambur Red Hills High Rd, Vinayakapuram, Kolathur, Chennai, Tamil Nadu 600099

Sir,

My name is vishal suman having mobile no-[protected] (Vodaphone) visited the nearby airtel authorised shop for MNP request in to airtel, they charge me Rs.300.00 as a service charge, but not provided me any invoice, after I check at airtel site where MNP request is free of cost, now shop owner told me it is there service charge and not return my money even I asked about the invoice, he also not giving me invoice also.

Shop contact no is-[protected]