Impossible to get an Upgrade / Migration done!!!!!

I called your call centre yesterday to upgrade/migrate my current LTE contract to an Unlimited one. They referred me to the branch. I took time off work to go to the branch only to waste 60 mins of my life. They could not assist and called the call centre. we dealt with 7 different people and not a single person from LTE or Sales could assist. This morning I've wasted another 30 mins and am still being transferred to various departments and have now been on hold for more that 20 mins to your Sales department (or so the last person said). Why is it so impossible to do business with you? Do you not want the Sale? Perhaps I should rather apply for the Product with one of your competitors and see who provides me with the required service first. Goodluck!!!