Watch As I Desperately Try To Get Support From Stripe
support.stripe.com
support.stripe.com
In general, we are usually in chat several hours earlier than the posted times, but list those hours to make sure we're setting proper expectations. We're working to officially increase the coverage to be sure we're always there for you.
Why are you expecting them to be in live chat at 7am when they say the hours are 10am - 6pm?
I've no idea where the OP is, but I imagine US/Canadian east coasters aren't terribly happy about support hours being 1pm-9pm either.