TFG refuses to take resposibility for their incorrect online delivery

I ordered 13 items on-line on the 19th October for the amount of R9427.00. One incorrect item was delivered. TFG is refusing to deliver the correct item. They will only uplift the incorrect item. Once it is back in their warehouse I will then only then get a credit and can then order the missing item online or go to a @Home store and purchase it. The reason why I bought online is NOT to go to a shop. Their mistake and they refuse to complete this order online. If one sell online you rectify YOUR mistakes also online. This is at great inconvenience to me. Unproffesional, uncaring and unacceptable service. This issue is still unresolved 3 weeks later. They must take resposibility for their mistakes and stop hiding behind their so-called policies.