Capital One Platinum Costco MASTERCARD Consumer Reviews

I got my card blocked 3 times within a couple months for supposedly fraudulent transactions. Every time I had to call wait for the agent, answer all the security questions + transactions one by one for the last 7 days, then got transferred to the security centre and restart the process again security questions, transactions one by one for the last 7 days, then got my card unblocked. The best waiting time was 50 mins, the worst was over 2h 30 minutes and I was at the cashier of Costco. I did an official complaint at Costco customer service about Capital One the same day. I can tell you Costco cares. This problem seems to be resolved as I receive now an email asking if I recognize the possibly fraudulent transactions and I can respond by email without anything else to do. Like many other reviewers, I also got refused for a higher credit limit despite I always pay the whole amount of my statement account every month in time. I'm using this card primarily for daily expenses because of the great cashback also for the no annual fee. I have other credit cards with much higher limit as a back up.