Property management suggests that a property is managed. Acorn do nothing but ignore emails and phone calls and do everything in their power to avoid representing the best interests of the property occupants, seeming to prefer to do their best to avoid any and all costs to their partner company, Skillcrown, who build the properties they manage.
They have managed to ignore leaky roofs, lift telephones that don't work, insecure locks, to name just a few of the issues that they have dealt with as if they were of no importance whatsoever to them.
Do not, on any account, allow them to manage a property that you own.
What agent could do to change your mind?
They could have done their job, instead of being surly, obstructive and downright unprofessional.