Vodacom H 500-s Router

I have been in contact with a support contractor as i asked him to confirm if my H 500-s Fiber Router Firmware is up to date, and i have not heard from him since the 02 Jun at 14:37 when i sent him a Mail asking to verify if the Firmware was up to date. I still have the same issue where as my Router reboots unexpectedly during the day. I sent him a follow up mail asking again, and still no reply. I am working from home and i have noticed that it was creating a Pattern with the time for the Rebooting, but at the moment it is random. this is getting very frustrating as it cuts my Internet connection during meetings and i am having trouble to do Work as well as I am giving Online Global Support.