I understand your feelings. However, banks do not need to notify customers of the fees set by themselves. Next time you go to the bank's business office and ask for a credit card application form, there should be a description of this in the regulations on the back. That is, banks can change the rules for using credit cards without directly informing customers.
Not bad. At least if you call this bank, the bank will give you an explanation.
Last year, China Mobile forced me to buy a package without any explanation. I called customer service and was asked to wait. Anyway, I changed my number, so I don’t expect to wait for them to reply to me.
In the future, apply for a credit card from another bank.