Vodafone India — reg refund

Address:

400064

I was vodafone customer till may 26 2017. After that i have changed my telecom provider from vodafone to jio. I paid my bill twice while porting. I have called multiple times to customer care, even visited vodafone store. I got a response on email that will get my access amount in 15 days on jun 14 2017. After 1 month that i visited vodafone store where i was supposed to get my cheque. They told ne that they didn't receive any cheque till now. Once they received, will get call. Almost 100 days has passed still no response from vodafone. These companies put late charges if customer doesn't pay bill on time. But during refund, they never show professionalism. They should refund with interest if they don't pay on given time. Please help.