Hongkong & Shanghai Banking Corporation [Hsbc] — Bank not providing option for part payment for personal loan

I have a running personal loan with HSBC India, which I had taken 3-4 years back and have been paying my EMIs regularly.

Now, I want to make some part payment towards that loan based on whatever maximum is allowed as per loan agreement.

I have raised multiple request to bank to provide me a Part payment option for the loan but have not got any response. Also, I have tried calling them but have not got any response.

I understand this sounds more of a customer care issue, but I have been raising request to them since last one month and have got no positive response. Because of all this I will have to pay additional interest for one month which I wouldn't have if they had provided a part payment option to me on time.

As of today also, I have not got any response from HSBC about how much part payment I am eligible to make and how to make.

My personal loan account number with HSBC is[protected].

It feels like cheated if because of banks delay someone has to pay interest for that period.