Never,ever upgrade with telkom

On the 25 February 2016 I upgraded my contract with telkom mobile.I have recieved my bill and have to pay an extra R200 from 1 Feb-29 Feb which is for the device I have been told and another R200 for March.I am on a Smartplan 100 plan for R299 but have to pay R499 in March.I also paid R150 in the store which I was told is an upgrade fee.I feel telkom is penalising me for upgrading,I will never ever upgrade with telkom again,i never had this problem with vodacom,mtn or cell c.Telkom is the worst mobile service provider when it comes to upgrades.I should have waited 2 months for my contract to expire and moved to mtn.I will make sure I inform others never to upgrade with telkom.