Fandover

I have lived in Spain for the last 11 years but have only taken out residency in 2020, before this I still had a house in England so chose to pay my taxes in England. On becoming resident in Spain I switched my tax domicile to Spain and have paid tax here for the past 4 years. Two years ago the Spanish tax authorities came to the conclusion that i lived in Spain for the years 2016 and 2017, and issued me with a tax bill for those two years and started taking the money out of my bank. I have tried to fight this but have got nowhere so have now paid double tax for these two years. Is there anything I can do about this and can HMRC assist me in either fighting this or getting a refund on the tax I paid in England for those two years.