Appalling service from customer care team

I ordered medication online for my mother for delivery. I proceeded to pay and once I paid, I noticed that the delivery address was incorrect even after I had entered the details correctly prior to payment. Nevertheless, I called customer care immediately to resolve the issue, however, I was told to contact the pharmacy.

I called the pharmacy and unfortunately I was told that the medication was not on the system. I was told to call customer services again.

I called customer services for the 4th time after my airtime continued to finish, the agent was able to assist me with changing the details or so I thought. After my airtime cut, I called back and this time to verify the address was changed, only find out that it was not logged at all.

So I went through the process again with another agent who finally assisted me with changing the delivery details.

The service I received is unacceptable and appalling. I am extremely frustrated with constantly calling and wasting my airtime when in the first place, the agent could have assisted me!