short changed

I really feel begrudged that when you get to shop ,consultants are eager to assist especially when a new contract is signed because that will ensure that they receive commission come month end.They forget to explain the pros and cons of the contract.They never inform that other phones are not covered by warranty if you choose not to take insurance,I have a Samsung S4 mini that has a motherboard damaged and now they want R3800 for it and now we are paying for a contract without a gadget because the consultant failed to explain details.