Sending rice cookers is a marketing strategy of the credit card marketing center. It will only give you things if it can achieve its purpose of making money.

After the credit card is issued, if you don’t use it, you don’t need to activate it. If you don’t activate it, you won’t incur any fees.

As long as it is not activated and the bank troubles you, you can complain to the China Banking Regulatory Commission. He didn't dare to jump anymore.