Prices differ (online and store)

I went to Telkom website looking for the phone I can buy I answered security questions incorrect, I was advised to go to the store. I saw P10 LITE, I went to the store to apply for it on the 8/09/2017. I got the phone on the same day and I was happy with the quick service. I spoke to Nomxolisi & Anne, to confirm the instalment, she said my package R239, I asked Them why is the amount differ from the one I saw online According to my knowledge the installment is R219.00 PM

I went to the branch and signed for that phone hoping that everything on Telkom website is true and does not mislead customers.