Hj @shelley56
Were you still in the previous property on 24 August 2025?
That was the qualifying date for the WHD.
If you were then was OVO your electricity supplier at that pevious property?
If not then who was the supplier there?
The supplier at that time/property will be responsible for crediting the £150 to you.
If you were with a different supplier at your previous property then get in touch with them about getting the £150 to you.
If you were with OVO there but had a different account number then contact OVO about it.
No matter who your supplier was on 24 August 2025 you are still entitled to the WHD from them evern if you have moved home and/or or changed supplter since.
If you were a Direct Debit customer they will usually automatically credit it to the bank account that you were paying the Direct Debit from.
See the first 4 posts made here: https://forums.moneysavingexpert.com/discussion/comment/81735343
If you were not a Direct Debit customer then contact them and ask them to pay it to a bank account of your choice. Note they may instead send a cheque.