My guy, the screenshots that you posted were from other websites that are nearing three years old. You tried to do research before your purchase, which is great, but if you thought there was a discrepancy or something wasn’t clear, you should have contacted them for verification. Instead, you relied on a third and fourth party’s very outdated information. Then you blasted PVA for not responding the first business day after Christmas. When they stopped including a ball head, they removed text from the page that said a ball head was included. Presumably, you feel they should update their product page to specifically say that a ball head isn’t included. Do you think everyone selling any product should explicitly list everything that isn’t included? That’ll work well.
You made a mistake. Own it. After all, that’s what you’ve spent two days and 25 posts trying to get PVA to do, isn’t it? The difference is, they didn’t make a mistake here.
It’s been said and I’ll say it again. PVA probably would have graciously waived your restocking fee if you had told them, “I’m sorry, after reading all these reviews of this product, I really thought it came with the ball head and whatever else. I really can’t afford to buy those separately, would it be possible to return this?”
Unfortunately, you chose the vinegar instead of the honey and thus you’ve made your bed. Own your mistakes and move on. We all make them. There’s no shame in making a mistake, only in how you handle the aftermath.