According to the Contract Law of People's Republic of China (PRC), the parties shall perform their obligations in accordance with the contract. If one party fails to perform its contractual obligations or fails to perform its contractual obligations, causing losses to the other party, it shall be liable for breach of contract. Therefore, if you have evidence to prove that the auxiliary auction institution is unprofessional, such as failing to provide services in accordance with the contract and the service quality is not up to standard, you can terminate the contract according to the terms of the contract and ask the auxiliary auction institution to bear the corresponding liability for breach of contract. The specific terms of contract termination and the liability for breach of contract need to be analyzed according to the contents of the contract.