Use a grocery store with its own delivery service. You might have to bite the bullet and do without those products you prefer. Remember, they are a preference not a requirement. It is only fair that such adjustments be made.

Another possible solution is to use paratransit. Your mental health might qualify as a disability and thus you could be entitled to transportation. This unfortunately will mean having to rely on their schedule not yours but heck, it is a solution anyway. Also, I wonder if you are on disability or social assistance. Most that I have heard of have a provision for transportation costs. You are still reliant on someone else but, heck too, this is better than what you are doing now right?