Quality Assurance Auctions review: 2 cars I purchased and not received

I saw the advert for car on https://Qaauctions.com. Then I contacted the company via the whatsapp number on the web page +1 954 997 1450. (I think respondent's name is Eric) I then finally purchased 2 cars from qaauctions since February 2021.
a. First car : Range Rover Evoque SE 2017 purchased on 18 February 2021.
b. Second car: Mercedes-Benz GLE 350W4 purchased on 25 February 2021.
I got the invoices and payment receipts for both cars on separate dates according to the purchases via emails from admin@qaauctions.com.
Thereafter, Jennifer (+1561 332 7996) mailed me to introduce herself as the person handling my purchases. Jennifer later sent 2 dock receipts for the 2 cars separately since the cars were not purchased on the day. Since then, Eric stopped responding to my messages since 19 March 2021 and Jennifer since 7 April 2021 up till today 19 April 2021.