Affordable Fruity Menthol flavors? (And some hardware help, please)

Not having much luck with ejuice and my hardware. Subtank issues, 1.5 OCC heads have muted flavour and I tried the RBA but the 0.5 coil is too harsh and I have to be honest I don't fancy making my own, I really don't. I just want something easily replaceable and consistent, if that's possible.

So I'm trying to keep things simple and looking for something with a lot of flavour, but that's also fairly cheap. So I figured a fruity menthol would be a good place to go since I'm coming from minty nicotine gum. (Trying to get away from it because it upsets my stomach, to the point where I can't have a normal bowel movement when I'm using it)

It needs to be affordable because I've spent over £80 so far on gear/juice and I don't even have a working setup any more. I don't even have any juice because Novavapes sent me a different juice than the one I wanted. I don't want to argue with the company, I just threw the juice in the bin and won't buy from them again.

Also does anyone know something a bit more consistent than the 1.5 OCC heads in the subtank? It was great for a day then it just kinda died off I feel. Would the 1.2 OCC heads have been more consistent or should I buy some cheap clearomizers instead?

This whole experience has been pretty stressful and I apologize if I'm coming across as a bit of a cunt, but I don't exactly make a lot of money and I really want this to work.