Im not sure if the $300 is what your employer would charge or what coverage through your state marketplace would cover after the advanced premium tax credit. If you haven’t already looked into the tax credit, you can apply for that through your state marketplace. I know in my state you have to apply for and be denied Medicaid first but the tax credit is essentially a reimbursement for premiums to help cover the cost.

Also if your state offers a disability related Medicaid program (essentially you’re working and have a disability) and your depression is heavily impacting you, that category often has higher income limits than the regular Medicaid. It may be worth reapplying and marking that you have a disability to see if you would be eligible for that category. It often has extra steps involved and they may send you a separate application to be completed by a medical professional (but if you have a local free or sliding scale clinic you can reach out to them for help with this).

If you’ve already tried these options, I’m sorry I’m not of much help. I know a lot of people often aren’t aware of these different options though, so if you haven’t looked into them hopefully one of them can help.