Help Moto G3 Update to Marshmallow does not download


Hi all, it has been a week now that I keep trying to update to marshmallow, it downloads to 99% and than it hangs there forever saying that it has 1 second left of the download. I tried everything. Left it for an hour(s) but it just doesnt finish.
I only have the phone for about 3 weeks and am not very familiar with android altogether.
Does anyone have any tips or has the same issues? Thank you!!