[mangoandmimi]

I'd definitely stop with the hamster ball, to be honest they're not suitable for any hamster but are worst for robos since they're so fast and can be very nervous. The playpen doesn't sound escape proof if even a robo can jump out. Maybe try a taming bin, a large enough one that you're not going in directly from above.
For now I would leave him be, at least for a few days and just talk gently to him. You mustn't rush to pick them up or it'll just make matters worse. Try hand feeding him treats and see if he'll take them, if it's fresh food/veg it might help as those tend to be favourites. Once he starts sniffing your hand and coming near you willingly it'll probably be ok to try picking him up again but the whole process can take a while, so just keep going a little bit every day if you can. It is absolutely possible to tame them but it just might take longer than for some other hamsters.