Vodafone — Vodafone balance Rs 704 to be refunded and not done

I have ported the Vodafone number to BSNL.During porting he number, Vodafone asked me to submit some amount and when I said tell me exact outstanding, they said they will refund the remaining balance.my balance is Rs 704.I have submitted all the bills, no bill was pending and I have paid the double amount to vodafone for which their Customer service team said it is Rs 704 and they will refund.after 2-3 days when I again and again done the tweet they said they have sent the cheque of Rs 704, and I never received that cheque.I told them you can check with my bank.I have not received any cheque from vodafone.They said the courier didnt go because of lockdown.I asked them to transfer my money to my bank account.they said they will transfer but they never transferred the balance amount.I had done many tweets to Customer service, Head of Department, owner of Vodafone, and in all the branches across world but I never got my money back.Customer service told us why are you getting irritated for just Rs 704.its a small amount.I am a Retired Pentioner and above all the amount is less or more, its public amount.how can they keep public amount with them.They harrased me a lot and spoke very rudely as well.Vodafone did this many people.somehow people feel pain to file compaint for small amount but I thought to do it because I think these fraud companies should be addressed by you.