MyTrip review: Flight cancelled no refund received.

Return flight cancelled by airline from New Zealand to UK March 2020. Airlines informed if booked by agent to contact them for the refund. Mytrip still issued tickets but there was no flight and airports closed due to Covid19. Could not get hold of mytrip by phone or email. Logged on their site and received a etrack number. Totally understood the enormity of the situation and realized it would take time. Since our cancellation was in the 1st week of most countries lockdown expected it to be dealt with ahead of later dated cancellations. Emailed many many times with just an automated reply. Took 2 years to actually speak to someone and was told they had the case on file and was inhand. Heard nothing more. Sent many emails over the years. Finally had a reply to an email replied to, stating the time had run out to claim a refund according to airline guidelines. I quiried this but again the same reply. The airline guidelines has nothing to do with my case it is mytrip who should have put the claim in knowing full well flights were cancelled. I had filed details less than a month from cancellation with mytrip. It is the companies fault for not claiming my refund not mine. Where do I go from here ?

eTrackNr:[protected]