I am having similar issue. At the time of Pinnacle card application, it showed me 5000 as joining fee. However got an SMS after card got dispatched saying the joining fee is 15,000 INR.
I have not activated the card and called the Indusland customer care (2 days after receiving the physical card) to enquire about the joining fee for my card. I got reply saying that they can not see joining fee details in my credit card account and typically it may take 7 days to reflect the joining fee on the account
😱 . They asked me to call again after a week. Looks like their IT systems are ancient
I will call again after a week and request for cancellation if they insist for 15k joining fee.