SMTP servers continuously hanging

Vodacom - I am currently on hold waiting to speak to your consultant for 45minutes!!! - As a company, we use your SMTP servers [URL Removed] for outgoing email. I have made numerous calls to your call center for the last 2 weeks, These issues were fixed for a few hours and back to no service. I cannot be sitting on the line waiting to speak to your consultants every day, I also cannot be expected to test if your service is functional every day. This is costing our company allot of money due to your quick fixes / lack of getting permanent solution. The following are the reference numbers : <br> 1. (09 February 2016) - A7/CSJ7/5BSG, the person I spoke to is Numsa<br> 2. (07 February 2016) - ***, the person I spoke to is Oscar<br> 3. ***, the person I spoke to is Talita.<br> Please advise if Vodacom cannot provide the service you promise to the public and we will not be dependent on you!