These have all been from previous days for this same call centre and are all still active.
I think 2 of the 833 numbers have been listed over the last couple of days in separate threads
8335104385 eBay support refund
8336662159 eBay support refund
8338382331 eBay support refund
8338701932 eBay support refund
8773050721 eBay support refund
8773091457 eBay support refund
8775134012 eBay support refund
8778018342 eBay support refund