Dreadful - do not use

I have recently rented a flat managed by the Frost Partnership. They are entirely focused on making the sale. Once the contract has been signed and you have paid your money the level of service drops dramatically. They outsource every aspect of setting up the tenancy from producing the contract to the inventory and check-in and charge you for the privilege while they take a profit on all of the fees. They also arranged for a third party company to switch our energy supplier even though we had ticked the box expressly asking them not to do this. We are being inundated by people calling to take over our utilities and did not find out in time to cancel these transfers. Now I'm trying to get everything sorted out The Frost Partnership don't respond to emails or return my calls.