Sorry to see you are still having trouble watching the Masters despite checking the cables and rebooting.
Have you looked at Check service status at the top of the page? You can also a run a test on your equipment from there. This sometimes results in VM sending out a new box or engineer.
If nothing is showing you could also try the Service Status number 0800 561 0061. This often gives details of more local issues down to postcode level.
VM group their channels in mux's (clusters) - can you check the channels in the screenshot below. If they are also pixilated / breaking up then you have a signal problem and will need to contact VM Faults on 150 from a Virgin landline, or 0345 454 1111, option 2 (TV Faults) butbest to call between 8am and 10am to avoid call queues, or late afternoon around tea time
When calling Faults hopefully the system will recognise if you've used the online faults checker and place you into a queue for an agent to pick up.
If not and you get the automated response asking you to press 1 for the link to online support etc, ignore all the options and don't press any buttons then you should be placed into a queue and an agent should pick up the phone and resolve the problem.
The Service you do for others is the rent you pay for your room here on Earth - Muhammad Ali
Tried turning off box , checked cables they are fine , also all the other sports channel are ok . Just CHANNEL 505
Been on 505 for sometime - its all fine here - so it an issue on your connection
-------------------- John --------------------
I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.