How to get refund, not vouchers, from RyanAir

PBrandum

We had three separate flights booked for May last year. Total cost about £350. RyanAir cancelled them due to coronavirus. I filled out the online claim form being careful to specify cash refund, not vouchers. They sent me email reply stating '  Once approved your refund request will be processed within 20 working days to the original form of payment....'   I wrote to them in September asking for the claim to be processed as promised. No reply. In August they sent me vouchers  ' As part of processing your recent refund request....'    Last month I wrote again rejecting the vouchers I hadn't asked for and demanding a cash refund. Again, no reply. I have been unable to get through to them by phone. The vouchers expire in May.
I am thinking about pursuing this through the small claims court in Ireland. Can anyone give me advice or information about this or alternative routes to get the money back?

Thanks
Philip Brandum