The refund amount is not credit in my account

I order one plus buds 3 from big basket and after some mins they cancel order, then show the refund is credited but it’s not credited in my bank account then I contact there agent and they told me to connect with my bank , after connect with my bank agent through call they check and told me that 2425 is debited and not credited and I’ll confirm these with 2 different bank agent, after connecting 4-5 agent of big basket my problem is not resolve, they told me that there escalation team will contact me but they didn’t contact me