Have you tried phoning them? I didnt have support on one of my sage products but if you get lucky the person on the other end will sometimes help you if your running good.
I had this message through the sage feeds maybe it has something to do with it?
HMRC have recently notified us of their scheduled upgrade times during this payroll year end period, and as a result, we strongly recommend that you wait until 14 April or later to make your submission.
If you submit your year end returns between 6pm Tuesday 3 April and 6pm Friday 13 April your online submission acknowledgement will be delayed. You will not receive your acknowledgement from HMRC until Friday 13 April.
We strongly recommend that you wait until 14 April or later to make your submission. This ensures that you will receive a full acknowledgement from HMRC and Sage Payroll can provide and display your unique correlation ID number for your successful submission.
If you try to submit from 6pm on Tuesday 3 April to 6pm Friday 13 April, Sage Payroll will continually wait for an acknowledgement from HMRC and your software will be unresponsive. If this happens you will need to press Ctrl+Alt+Del. For help with this, please refer to Ask Sage article 23843.