I spoke to ACAS this morning, unfortunatly nothing can really be done about the wages, because if you wanted to file a complaint then by the time it gets to being sorted, you will of had your pay anyway, which cancels out the complaint!
Sounds abit backwards to me, cause you would be doing it because your wages dates have changed, so even though you have now been paid the fact still remains that your dates were changed
All he said you can really do is make the new owner aware of TUPE, but even then there is no set amount of time that they cant change things for.
Just have to make her aware of it and hope she takes more notice in the near future