No delivery and poor customer skills

Good day Hello Peter

I ordered a nike sneaker from Superbalist via their online app ...I have been a customer for 6 years now. They failed to deliver the parcel two times .Their excuse is the courier driver failed to contact me ( he had an old number of me on waybill.) I understand that ,but he was in the road he could've just popped in as the delivery adres is in a common busy street where myself and two security guards stand infront of the building because I am the access controller.They later admitted guilt after I logged a complaint.they try to shut me up by giving me a compensation code for 35% off any product , but I'm fine print it says it can't be used on any addidas,reebok,dkny and the list go on even the brand I initially purchased nike ! Who they taking for a fool and the amount must be minimum of R700 . The code is useless to me and I hate the way they took me for a fool. I have all the relevant emails exchanged between me and superbalist