Rude, unprofessional, dissatisfied

So this morning I spoke to 4 call center agents. First 2-the call got dropped and they never phoned back. 3rd one helped me as best he can and the 4th was just rude and Hung up on me mid sentence. I have had 2 bad experiences with Takealot recently and this one hit the 3rd mark. Background-I ordered products a week ago and the delivery date was set for the 24 of May (Today). This morning when I went into the app to see when the delivery will be here, the date changed to the 31st all of the sudden. So my order was delayed for another week. I saw that one of the products I have ordered is not available anymore so they are unable to deliver it by today. I told the 3rd agent it's fine and they can just deliver the other products today, as initially promised /scheduled on the app. Takelot NEVER informed us that the one product is out of stock and they don't know when they will have again nor did they inform us that the delivery date was extended by a week. I was calling on behalf of my mother (for which I received permission to do and have all of the relevant security info needed to confirm) yet the rude call center agent whom I spoke to last said that I am not allowed to speak to him as I am not the Account Holder because of the POPI Act. Sorry Takelot but maybe you should give your employees some more information as to what the POPI Act actually constitutes of and how they are allowed to implement it. Your neglegence at Takealot should not be my inconvenience. If you cannot deliver on your promise then why even have a so called "business". If you do not have good communication with your suppliers, that should not affect me as a customer who paid a ton of money already for said products. If you know how to run a business, you should know how to keep your promises and schedules given to the customer after payment. I will not recommend Takealot to anyone ever in my life as it is a bigger inconvenience at this stage than Eskom.