Bad service and lack of training

On 5th March I wrote to Outsurance requesting information for how to process my claim for a hearing aid that had broken. I get an email from someone asking me to contact them as they have been trying to phone me. I responded via email that I cannot take calls as I am Deaf and would they please write to me with their queries. I have not had a response despite me writing again. I do believe that on my Outsurance profile it is listed that I am Deaf and that I can only respond to emails or WhatsApp. I am increaingly frustrated with another large company who cannot or do not train their call centre stall regarding Deaf people. PLEASE CAN SOMEONE EMAIL ME REGARDING MY REQUEST!!?