Article 4 The parties have the right to voluntarily conclude a contract according to law, and no unit or individual may illegally interfere. Article 8 A legally established contract is legally binding on the parties. The parties shall perform their obligations as agreed, and shall not alter or terminate the contract without authorization. Contracts established according to law are protected by law. Article 107 If a party fails to perform its contractual obligations or fails to perform the contractual obligations in conformity with the contract, it shall be liable for breach of contract such as continuing to perform, taking remedial measures or compensating for losses. According to the above regulations, you signed the contract, so you need to bear the corresponding legal responsibilities. I suggest you contact your ex-boyfriend through the decorator, or directly negotiate with the landlord to transfer the store and pay the decoration fee with the transfer money.