Beware Surfshark renewal

i took a trial with surfshark i had it 2x before for a week each time, that was a while ago ,so i thought i would give it another try, i just tried to cancel and get a refund ,they said i had 30 days. they told me because i cancelled 2x that my limit is up and there is nothing they can do about it . Now i’m stuck for 2 years with this useless program and they said there is nothing they can do about, any one have a suggestion or an answer.
thank you in advance