Default [Q] Issue with update - HTC M7

Hi guys,

I have an HTC M7 - Unlocked, not rooted - and live in Dubai.

Yesterday I had a notification that a new system update was available for my phone but since I was not on WiFi, I opted to download later. When I got home and connected to WiFi, the update was gone. Every time I check for new update now, it says that phone is up to date and no update is available although software information says Sense 5.5 and clearly nothing has been updated.

Is there something I could do? Or is this a HTC server issue?