[Resolved]  HSBC Bank — Cheque clearance

Letter on behalf of my son Mr. Hitarth Desai, A/C NO.[protected] HSBC Bank.
We deposited one cheque which was not cleared aftera week. When complained it was traced & credited after @20 days. Written complaint was done, but the reply is "AC No. not written", for which scaned copy of slip sent. Also telephone complaint & written complaint(claiming damages) with, the answer is same. Bank Not responding.All the letters and slip's scaned copy can be provided. Please help.