Whistl has won three contract renewals with Barclays, Tesco and Debenhams.
Nick Wells, CEO Whistl, said: “Being the most cost effective, highest quality company in our sector is reflected in the renewal of contracts with long standing customers who continue to trust Whistl to deliver for them. We offer the best client account management in the business and the whole team working within Whistl are passionate about doing the best for our clients.”