Discovery Health - Poor/Lacking Service

Three emails sent to *** and despite being told a consultant will be in touch within three working days, this has not happened. Terribly frustrating having to chase a company such as Discovery in this manner. Been with them now for several years and starting to get annoyed at the level of service now being felt. Simple claim query and yet very little response/feedback apart from an email stating a reference number and a commitment to be handled within two - three working days...... yet still waiting for feedback?