Delivered incorrect phone

I purchased Nokia 5 dual sim card on Edgars online on the 19th of December and the phone was delivered on the 27th and i noticed it was a single sim instead of a dual sim, I called edgars on the 2nd of January 2018 and I spoke to Sbu who logged a call with this reference number ********** 2648/GO and told me to wait 48 hours, after that 48 hours passed, I did call Edgars several times and the agents kept on telling me to wait for 48 hours for another agent to call me back till today am still waiting, am even thinking of closing my account.