@Lilly, thank you for supporting MAKERbuino and welcome to the forum!
I am sorry for the problems that you’re experiencing.
I think that you might be dealing with a defective screen (which is quite strange as we double-check every screen before they’re being sent out to the customers).
Replacing a screen can get a bit tricky as you have to desolder 8 pins.
I’m not completely sure what caused the issue but I’d suggest you to send the screen back to our HQ:
Maksimilijana Vrhovca 11,
You can only send us the circuit board without the casing and the battery to lower the shipping weight and shipping cost.
I’ll personally fix your console and get it sent back to your address at no cost.
Please, send me a direct message after/if you send the console back to us.