CAF Cock up again...

So having finally sorted out my child benefit (for having 2 or more kids) and PAJE (for looking after Eloise until she's three) - the CAF asked just before Christmas for my pay slip for November and daddy's pay slip too.

I photocopied them within 2 days of the letter arriving, attached a copy of their letter as requested and then walked around to their office and popped it into the letterbox.

We have just received a letter from them dated 3rd January saying that as we didn't send the papers they requested (they didn't say which papers?) our child benefit and PAJE would be cancelled.

I checked online on their site - on 29th December (funny it takes 7 days to make it from their post box to someone's desk, ok, ok I know it was Christmas) they said they received some papers from us and they were being studied and on 5th January our normal monies were paid to us.

I've twice tried to call them since - once their phone system was broken and once it was after 4pm and they close then... arggggh.

Thing is, do we have a problem now or not? - as we have received monies due, dated after their letter... soooo frustrating.