HDFC Bank — Personal loan Harassment calls

I have the same experience. This is nuisance. The same person will call you every few days and different callers repeat it. One of the caller mentioned they are HDFC business partners. Does it mean they get information from HDFC about customer contacts? I asked but she declined to provide update where they get the contact numbers from. If the bank is sharing the contacts, this is very unprofessional. I don't have this issue with Standard Chartered or ICICI bank and I am now minimizing use of HDFC bank account. Apparently, one keeps some FDs or balance with the bank and based on it one gets these calls. So address the root cause itself. Don't keep balance and FDs. Use it only for netbanking - this is the approach I have chosen.