Are you looking on the BA App? In which case, in the My Bookings list, are there two entries for the same flight? In which case it's a known display bug and nothing to worry about.

Otherwise it's possible your booking has been rebooked automatically due to some other change and has therefore ended up incorrectly in the wrong cabin.

I'm sure it can wait until Monday for a call to your service centre, moreover I imagine the Contact Centres are rather busy at the moment for obvious reasons.