I have contacted support and they have been very good, it might take a few days to get a reply though. They have suggested they send me a new phone and I send my old one back when it arrives. I got a txt from DHL that it will be here today.
So I would suggested contacting them as they are very helpful.
With regards to reboots, if you are having a lot of them try the phone without a SIM for a day (if you can) and see if the problem gets better. Mine definitely got better without a SIM, so I ordered a replacement SIM which caused less reboots.