Reliance Trends — Money debited from google pay but store didnt received so I paid again for that

Address:

Darbhanga, Bihar

Today I puchased 2 item at reliance trends shop at my hometown. For which I tried to pay from Gpay app after a request of payment from the shop. The money was debited from my account but due to server error purchase confirmation was failed. I paid the money in cash. But ₹1203 was already debited from my account, which they said would be credited back to my account within 5-7 working days. I complaint on helpline number for the refund and they assured me for that and told me to check SMS for complaint number. Till now, I haven't received any details. I told store manager to provide credit note but they refused. after a while they considered my complaint and provided me a vague handwritten letter of payment done. I payed again for the purchase. Please consider my complaint and do something.i am attaching the screenshot o[censored]PI transaction id with this.