That’s the problem with cheaper escooters, when something goes wrong, unless you know how to fix it yourself, finding and paying someone else to fix it usually costs more than the escooter is worth. And that’s assuming replacement parts are even available. There are too many fly-by-night companies/people who will find something from Alibaba, slap their name on it, create a fancy looking website and offer it to the public with limited to no after sales support.
Anyway, rant off. Hope you find a solution to your escooter problem.