Platinum Charge Card Annual Fee posted about a week ago.
Contacted via the chat function about 8pm on a weekday, nothing offered.
Called the following day about 9pm, nothing offered (spoke to someone offshore)
Called on a weekday about 12pm, nothing offered (spoke to an Australian who had the least interest of all the interactions in helping)
Contacted via the chat on the weekend about 9am, 200,000 MR points offered.
The chat agent that eventually offered them took quite a lot of prodding. She wanted me to call up but after asking a couple of times if she was sure there was nothing she could do herself to address the matter she offered to "check my account"
As best I can tell, your best chance might be to use the chat function and keep prodding and probing but absolutely don't utter the phrase "annual fee", just complain about the lack of benefits.