If you can find a place where you would be able to buy the parts (digitizer and screen) and have the repair shop install the parts for you then you might find more places offering to fix the tablet.
[https://www.amazon.com/Replacement-Screen-Digitizer-Voyager-RCT6773W42B/dp/B017HJB6FY|If your screen is cracked/malfunctioning but the LCD is fine, buy only this part]
[https://www.amazon.com/pcspareparts-Replacment-Display-Voyager-RCT6773W42B/dp/B017HJ9CNM|If your screen is cracked/malfunctioning AND the LCD is broken/malfunctioing, buy the part above and this part here too.]