Videotron’s ultravast LTE network goes where you go, unless it’s to Osheaga

I’d like to know why I should continue to use Videotron mobility when it was completely useless at Osheaga on Saturday? Both my companion and, both videotron customers, where left with no data except for the occasional 3G connection for our entire Osheaga experience, which is not what your ads seem to advertising. Maybe Bell is right, maybe we should switch. Please explain why I should continue stay with your company!

thank you