Data service/network

Ever since Vodacom had the big outage in cape town about a month ago, their data service has become close to useless during the day.I have now tested in extensively and the service is terrible and then after midnight up until 6am it's usable. This seems to be deliberate and when I query it the call centre and technical department deny anything is wrong. I pay for a service that is effectively useless for the majority of the day. I want to know why and i insist that at be fixed!!!<br> <br> Once again more than dissapointed with Vodacom service