Stripe support can be contacted for anything pertaining to your Merchant Dashboard. This can include payout settings, dispute management, and more.
Stripe offers robust documentation, which can answer most if not all of your questions, here.
If you still need help and would like to contact Stripe directly, you can follow the link here. You will need to login to your Stripe account so that you have access to contact their Support team via email, phone, or chat.