Kotak Mahindra Bank — terrible - harassment calls being faced by kotak mahindra bank loan recovery agent/s

This is with regards to the harassment calls being faced by kotak mahindra bank loan recovery agent/s. From no.[protected]. He keeps changing the name mostly by name prosenjit. Number reports spam.

Firstly - i do not have any loans pending.
There was one loan taken about 13-14 years ago of 30k which was repaid in full - the last of the installment was collected and closed.
Someone called last year - explained all the details - and asked him to share the statement of account with details of every collected payment and cheques and the person never got back.
Again there are flows of such harassment calls to all my relatives, office colleagues & sundry listed on my phone contacts which is not only uncouth & unprofessional to do but unethical considering loan is fully repaid. The last installment was paid with +1800/- penalty too.

I have registered a police complaint under section 506 also against this number - have complained to kotak ceo too. Should i complain to cyber crime for the calls he makes to all my contacts? Please advise.