I'm sorry to hear that you have encountered difficulties on your journey.
It's good that you have started to search for help. I'm sure you'll find that from this forum.
I also used to be hungry all the time so I know how frustrating that can be. But that was my fault for not eating enough. I tend to eat a lot of bread and fruit instead of full meals, because that's just how I am. I also kinda like hunger. It makes everything taste better.
But being vegan doesn't equal being hungry all the time. That isn't normal.
If you are a newbie, it might take some time before your body gets used to the new diet. You said that you can't afford it, but I'm still going to advice you to eat higher volume than what you'd normally eat. At least for a while, so that your body can adjust. Then gradually reduce the amount back to normal.
If you can have the time, I'd also advice using CronOmeter to track calories. Maybe just try that every now and then? It would be interesting, especially during the days when you are eating less than normally. Keeping a food diary at hand can be helpful with this in case you eat often or don't have time to use the CronOmeter every day and tend to forget what you have eaten.
Feelings of hunger can also be caused by not drinking enough water. I know this is a lot, but at least at the time being, I'd advice measuring your water bottle and a coffee mug, if those don't say what the capacity is. That's how you can track also how much you drink and make sure that it's enough.