Uc single claim to joint claim

So I’m due to be paid my single payment on 20th March my assessment period is 14th to 13th of every month and I changed it to a joint claim yesterday will I still get my single payment next week as I spoke to uc and was told it just gets carried over

Hi there,
Is this a query for Universal Credit?

I rang them this morning and was told it would be carried over and would still get my single claim but still want to no