Sensitive Product - Insensitive Service

Having done everything required as per website a pre-approval for a loan was received. Subsequently I have left 5 messages via phone, 4 via website and emailed thrice. I have received 2 emails from the wrong department that never responded again when I advised of the error. I have received 3 calls which never connect, last about 10 seconds, not to be repeated. I have remained calm and polite throughout the 3 weeks it has taken to not get anything except off-hand call centre people and silence. The application for the loan was for a handicapped individual that made arrangements to fit into RCS requirements. I acknowledge completely they have every right to not offer finance, even after a pre-approval, but at least that could be communicated, or my calls answered, or show some empathy for someone who does not have it quite as easy communicating due to a hearing disability. Bare in mind they never accumulated any further information from when the pre-approval was sent. I've never spent so much money and time being ignored by a firm, and I have dealt with many. This stands out as a truly lousy experience, particularly given the fact it involved an urgent appeal for financial assistance which had seemed to be answered. This is my last effort as I have truly exhausted every possible option RCS gives clients to contact them. Very frustrated and demoralised are we.