Bajaj Finserv — emi card cancellation and unsolicited charges exploited

Bajaj finance has issued a emi card few years back and now there is absolutely no way i find to cancel it. This in turn has ended up in a big headache of receiving at least five calls a day timely and untimely. Also the recent surprise is that an amount of 117 is deducted from my account without any authorization from me. Seems a respected name like bajaj is now totally into a fraud and money looting business.
Do let me know the process to cancel the card and terminate all relation with bajaj finserv.
Customer service number never allows to speak to an executive. Seems the organisation runs a end to end setup with financial looting and criminal intent. Have requested over phone and emails many times to avoid frequent ivr calls, no use and organisations seems to have taken privacy breach granted.