What is your buyer expecting from you?
Does the product you promised to deliver to your buyer really meet his or her desired needs? As soon as you are able to sell the product with the satisfaction of the buyer, he will continue to receive your next service.
The customer's goal is to say goodbye. The target does not have to say goodbye. Where there is inconsistency, there is no goal. Keep your buyer safe. Keep the commitment. Arrange delivery of the promised product on time. If there is any issue of returning the product, accept it with a smile.
Because buyer reference is a big issue. Maintain a good relationship with old buyers as you find new buyers.