RCS deliberate insurance claim delay

I have been trying to claim for loss of income on my game credit store card since the 13th of June. I have completed all the required documents and I have sent through all the required supporting documents to prove my loss of income during covid lockdown. RCS have been deliberately delaying the process constantly asking for the same claim form to be completed over and over again. I have been Sending emails to follow up for the last 2 weeks and I have not received a reply! What is the point of paying insurance on debt if the insurer is deliberately delaying the process and not helping at all? Horrible service from RCS. Will never finance anything through them ever again!