They gave me a 'special order'

I ordered Nando's online through a delivery company yesterday (19/11/2017). The Nando's eagle landing outlet accepted my order. I called them just to ask them to put some extra sauce on the chicken. I wish I hadn't called because maybe I wouldn't have disturbed their so busy schedule. I spoke to a very rude lady by the name of Zanele. Before I could finish stating my request, she was already cutting me off asking where or how I ordered the food. After she finally listened she put me on hold 3 times whilst exasperating the whole time. In any case, she came back to me and said yes we will put in extra sauce for you. When I hung up I told my fiance that something did not sound right about this lady. Our order arrived, 2mins earlier than the estimated time, and I am obviously pleasantly suprised. I open the chicken packet, not only did she make sure that they do not put extra sauce, I am sure she told them not to put any sauce at all. I paid for a dry chicken meal. I called them back enquiring why there's absolutely no sauce, Zanele just put me on hold again for the manager who also did nothing absolutely to help me. It may seem miniscule to someone but I earn my money and I would like to get what I am promised. If we (customers) weren't buying, there wouldn't be any business and we wouldn't also have the satisfaction of the food. I definitely will not be orseeing from them as my fiance and I had upset stomachs the majority of the night. Such bad service