Ali Express — always delayed /no deliveries

Address:

403602

You take money in advance and deliver the material after 3/4 weeks or do not deliver the material and refund the money. You make use of the customers money for 2/3 months and refund money. You expect the customer to happy for the full refund initiated by you. When others like banggood can arrange in time, why can't you do the same?
Totalled disappointed with your service.