If your ACT led is not blinking rapidly on boot, then yes your Pi can not read your SD card.
The ACT LED is essential in determining if the Pi can actually read from the card. for non RPI4's It indicates that it can read from the card by blinking, If the ACT LED doesn't blink quickly in an irregular pattern for at least twenty seconds, this indicates that the Pi cannot read from the SD card, and that booting is not taking place
Sorry, I don't have recommendations for shops to fix it, but I know that EKT/Katranji sells RPi so it may be worth asking them if they can fix it.