Long Story, so please bear with me.

I originally had a flight booked with Delta on their website, and a 006 ticket all the way from LHR-YYZ via JFK as a return ticket.
The outbound flight schedule was drastically changed by Delta which meant, I needed to change to another flight.

> Called up Delta's UK Number, which I think is KLM/AF? And they re-ticketed me onto the new preferred service (Still not a KLM or AF Flight!) - But now my ticket is a 074, which is reflected on both sites.

Here's where the two issues arrived:
1) I now have two different PNR's, the original which works on Delta and shows all the correct details. But I also have one which works for KLM website, which shows all the new flights but has left the old flight in the booking, so I don't want this left in the booking in case it flags me as a no show even though I don't need that flight anymore!

2) For the new flight on each booking, On the Delta Website I'm seat 27K and on the KLM Website I'm Seat 27H. Two seats, on the same flight and ticket number??? I've never seen this before.

Who would you recommend calling to fix this?