My debit card company is blocking crypto purchases. Is this legal?

My debit card company is blocking my crypto purchases. The associates are telling me they just dont understand what crypto is. They have been making up story after story. Outright lieing to me saying they cant see the declined transactions, and then all of the sudden they do see them but they cant do anything about it. Do I have any legal recourse, this is a debit card and not a line of credit. How can they tell me how and what I can spend my money on? I'm in the United States, this feels like a violation of the Electronic Funds Transfer Act.