If you have paid everything in full [Amount + Actual Interest without Settlement], then this is a good case against HSBC to be filed with RBI. Please relax, your record has to be rectified by HSBC at CIBIL.
Draft a letter with relevant records [Photocopies] and send it to the Banking Ombudsman of RBI by Speedpost and ask for speedy disposal of the matter. Choose the Ombudsman depending on your state of Residence.
Separately, file a letter with HSBC Ombudsman acking to change your CIBIL records within 30 days and a copy of the letter that shall be sent to CIBIL be also copied to you. Failing which, state you will file a complaint against HSBC in the consumer court. In this case, go ahead and seek compensation from HSBC for all the mess.
Best