UK renters right issue with amending rent due date
Me and my partner and our landlord all previously signed an agreement with our letting agents prior to the new renters right bill, to have our rent date amended. This was processed by our property manager but was then was never completed by their accounts team before the new legislation. Our letting agents are now saying that under the new laws, they are unable to amend the rent due date as it is against the law to do so, even though both parties have agreed to the rent due date amendment. Can somebody give me some advice on whether what they are saying is legit and what I should do going forward with this? Please note, I'm based in England