Don’t contact the customer: When customers don’t hear from you, they don’t think of you.
Change salespeople frequently: It takes time for a salesperson to gain a customer’s confidence. Frequent sales personnel changes make it difficult to establish a good relationship with a customer.
Resist change: Customer needs change, and if you stick with the same old policies, you won’t be able to satisfy their changing needs.
Ignore financial responsibilities: Some sure ways to lose a customer are slow or arbitrary credit adjustments, budget overruns and incorrect invoicing.