I am an Unhappy customer- VERY UNHAPPY

Vodacom has to really think of giving their call centre agents more training.Some of them show no enthusiasm or try going the extra mile for a customer.Sometimes I dont even want to call the call centre,If I call and they say must score them after the call I even drop.Todays complaint when I called- I made a silly mistake as a customer.I have been using alot of data this past month so my friend said to me I must try out the WIFI data.So I bought 100MB.I cannot use it because most of the areas I am in their WIFI is secured.Now my 100MB just sit there-spoke to 2 call centre agents this morning-I asked the 2nd one is there anyway I can transfer the WIFI data to Data Bundles-not even trying to assist-she says NO it will just expire.We cannot help you. I understand its my mistake, but is there no way.I still have the vouchers.The attitude of youur agents is really just pathetic-they make all of the people look bad- some of them you can hardly hear their names.When I make the call I just want them to help and then I must end the call quick.PLEASE CAN I GET HELP.I have been a loyal customer for many years now and I keep wanting to change over to someone cheaper and reliable like cell c.