Your legal relationship there should be like this: Housing Authority-transferor, transferor-you (but "Housing Authority-you" cannot be established, because the Housing Authority has a regulation that "the lessee is not allowed to transfer". )
If you look for the housing manager, he can have reason to ignore you, and at the same time, he can pursue the legal responsibility of the transferor, which may make your original negotiation with the transferor "invalid".
Since you have nothing to do with the Legal Department, the Housing Authority has the right to ignore you, so I suggest you put pressure on the transferor to negotiate with the Housing Authority.
Finally, the problem caused by the store can only be between you and the transferor. If the house management is rude in the future, you will suffer a big loss. (It is suggested to either retire or the three parties sit down and re-sign a contract agreed by all three parties. However, it should be noted that since the contract you signed with the transferor is illegal, you are likely to face legal support. )