Hi Jason,
We can feel the disappointment you have with this range. We are here to help you.
We recommend checking the resources below for steps to take when the ignition fails. Please click on the embedded links for more details.
One burner on the cooktop does not work:
https://www.samsung.com/us/support/troubleshooting/TSG01001949/#a-radiant-element-on-the-electric-cooktop-does-not-work
To help you with the broken knobs, you may reach out to our Samsung Parts Team to order the parts needed for your Samsung range at (800) 627-4368.
They are open from Monday to Friday between 9:00 a.m. to 6:30 p.m. EST. They can check the available parts or accessories you wish to purchase.
We would like to speak to you directly to gather more details about the gas leak and the other appliances you mentioned.
Please feel free to get back to us the soonest via the following options:
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
When you message us, please provide us with this reference number (1147527633), to help our team pull up your information.
Have a great day!
^Rodel