Vodacom LTE Broadband the worst

We have a Broadband LTE solution from Vodacom. It worked fine initially but for the last 6 months it has gone from bad to worst. The signal drops causing network connectivity issues. The IP name resolution is a constant issue and their "Technical support" has no clue, from obvious lack of proper training and s****s. Some months data usage is more than double, which we could never identify were the data is going. We lost 8 GB last week even tough users were switched to ADSL solution as a test. The worst is the don't care attitude from Vodacom staff. This was the worst data solution I have ever implemented.