Have you checked the batteries? Make sure they're charged and you didn't insert AA batteries instead of the Li-Ions.
Otherwise it might be a wiring issue which should be checked and solved by Ultrasabers since you said you're not good in such things. They will charge a fee, but will do the work for you.
Yeah I tried aa first and didn't know, I lost the original batteries and was going to try lithium ion before buying the ones on here. Would you happen to know if they work or just the ones from the site?