CERTIFICATION OF DEVICE (PHONE)

I bought a device from Revibe (Samsung S21+) on the 15th of July, 2026; it arrived a week later. However, on the same day of the device's arrival, I tried to set it up, and everything was okay until I tried to install WhatsApp and other apps, such as a banking app. I then realized that the device is not certified under the Play Store, and it reads such apps as harmful. I logged a warranty claim, and the device was picked up within the 10-day period of the warranty claim. The device was on their possession from the 28th of July and i only received it after fighting with them at that because when i was tracking the progress, the device was worked on and finished by the 13th of Aug, i called everyday in regards to my phone being delivered back to me and I only received it on the 25th of Aug. To my surprise, the device came back with the same issue. I do not have a phone currently, and that is really frustrating; their service is very terrible, as they give me run-arounds, and I would not recommend them to anyone, as they sell faulty phones. Please assist me in getting a refund.