Walmart Rewards Mastercard Credit Card Reviews

I received my Walmart Rewards Mastercard on June 26 of this year. By July 2nd it was on it's second “Security Investigation” for “abnormal activity”, no kidding… it had no activity history, I just received it, so wouldn't any activity be considered abnormal at this point?! It is now September 17th and the card is still under “Security Investigation” and none of their Security Department Agents can assist me. They just tell me to be patient and wait for someone to call me back. The first security investigation I was told occurred because I used the card, which they told me to do to earn the rewards I was promised. The second security investigation was because I tried to use the card at a dollar store! In the meantime, I am denied access to my online account to see what, if anything, is happening on the card and can't see my balance or if the 'insurance product' that I cancelled the day I received the card is indeed cancelled or if I'm being charged anything. It's completely frustrating! I do not understand why if my card is under security investigation is the security department can't help me? They say it's for my security, umm not feeling so secure when I can't see if there has been any activity on my account. Seems like a complete scam to me.