I don't think u can do it, they will ask u to apply for second card.

Existing Citibank cc customers would not be entitled to the RM60 rebate. It is written in the T&C which Citibank send to their customers via e-mail.

just call 1300 88 5555 & ask 4 the 2nd card application form. in the form you'll just fill in basic info & existing card no
i'm waiting 4 this new card to be approved & cancel my clear card

hmm , cancel all the credit card since the rm 50 tax imposed . Why pay the government for a lousy reply on the tax imposed . Using debit card now . Save 50 bucks . Hehe .

At last they entertain you by calling them to waive the AF, but not for citibank.

I had to cancel my Citibank Giant card because the bank refused to waive annual fee.
Although I used the card very often, the bank further demanded an utility auto debit instruction. I had nothing to auto-debit already.

I feel unsafe when banks can't tell black-and-white how to entitle for annual fee waiver. At least they must say "Spend at least RMXXX within XX months" or "Sign up for an auto debit and get 2 years annual fee waived", sort of that. But Citibank never does that. This year can waive, next year maybe not.
After all, I turned to DirectAccess which is free for life without condition.