Phone is network locked, I was not told - Consumer Complaint for PEP STORES

Good day, I purchased a kicka cellphone for R399 at the Pep store in Vincent. I was not aware the phone is network locked. The lady selling me the phone only asked if I have my own sim card, and I said yes. When I got home I was told by my wife I can't use my sim card on it as it only caters for Vodacom only. As you would know everyone buys a cellphone first in order to put in a simcard,but in this manner im being forced to only stick to Vodacom simcard ofwhich I'm not willing to do that.