UOB just deducted my UNI$ as annual fee for my credit card. What should I do?

If UOB does not want to waive your annual fee, you can choose to pay the annual fee for them to reinstate your Uni$. Whether this is worth it would depend on your valuation of a Uni$.

Contact their customer service to have it waive off. but it is subjected to their approval.

Call them and ask for a waiver, usually it;s approved and u will get the uni$ credited back

You can call to UOb hotline to seek a waiver. However, they have the right to reject your request of waiver and this becomes permanent