Is it legal for the store not to refund the deposit?

Illegal. In the housing lease contract, if the contract is terminated, whether to refund the deposit needs to be analyzed according to the following circumstances:

1 The lessee and the lessor negotiate to terminate the lease contract, and the refund of the deposit shall be subject to the agreement of both parties;

2 If the lessor's breach of contract leads to the lessee's request to terminate the contract and the deposit needs to be returned, the lessor shall bear the liability for breach of contract; Third, the lessee's breach of contract leads to the lessor's request to terminate the contract, and the lessee bears the liability for breach of contract and the deposit needs to be returned.