Payzapp — payment issues

Address:	Mumbai City, Maharashtra
Website:	payzapp.biz.hdfcbank.com/HDFCPayZapp/Account/Login.aspx

I must file a legal complaint if the following issue is not resolved. Please look into this very urgently.

My transaction id is 76751492 dated 27th sept 2019 for amount of inr 1, 100. The transaction status shows success in payzapp. However in my bill generated by the vendor for the next month, the vendor says that payment is outstanding. A system-generated response from payzapp was received on 16th oct 2019 that the issue will be resolved within 5 working days & the amount will be refunded within 5-10 working days fro the date of transaction. However, no action has been taken yet. after enquiring

The worst part - hdfc bank & payzapp customer care does not exist. Most pathetic customer suppport ever.