getting a PIN code-how to deal with a bank

It’s over three months that I am trying to get my lost PIN code for my credit card at ING bank. Every time I go to pick up a new PIN code there, an employee finds out that the code has been sent somewhere else, blocks it, orders it again, does the paperwork and tells to come in a week. In a week the story repeats. I feel helpless, because I cannot change the bank, until I have a permanent address. Am I entitled to any reimbursement, as I am not able to use my card and I spend lots of time at the bank? How could I complain and finally get the code? I am also quite embarrassed that most of the letters do not even reach my home country, even if the bank says they have been sent there.