Vacation Management Services is not giving service at all

We are owners for almost 30 years at Dikhololo butt the service we have been receiving from Vacation Management Services is not good. You can't even solve query at reception desk and need to call the call centre No service at all and no proper communication I have been trying almost over a week to sort query on telephone line or emails but no feedback at all You almost need to hold on for 20 minutes for someone to answer the call and then nobody is available(always in meeting) and the response you get is "the person will get back to you" After sale service is not good and frustrating.