Airtel — Accidentally recharged unknown number

Dear customer
Please reach out to the payment platform from which recharge is initiated as it was wrong mobile number.
Please write back to us if you have any query

I had taken, Airtel wifi connection (pre-paid) for 6 months whilst in Ahmedabad around 26 Nov 24, attached is the statement. I had to leave Ahmedabad for professional reasons, so i wanted to cancel connection, for which i put a request on 22nd march 25. I had clearly stated, i would be leaving the city by 30th march 25 and somebody to come and collect the devices (modem/router) from my residence before that and return the amount as per un-utilised service, as no one seem to be there to collect the devices, i had called thrice again on different day including the day i was moving. No one had come and collected, after moving from city, i again called and advised that i had given the devices to the neighbour. Now when i call to airtel helpline, they ask for mobile no or account no. or landline no. I entered my registered mobile no, which is not being accepted (incidentally i have Airtel mobile postpaid services also, so dont understand why my mobile no is not accepted), i have also attached the statement which has no mention of account no. or landline no. Also Airtel customer care has no provision/option to speak to customer care executive. This is very pathetic service from Airtel. I want this grievance to pass to higher executives of Airtel and they re-think their customer care options.
REgards,
Suraj