Parcel send to wrong address and have no care about it

I send a parcel on the 23rd of December to be delivered in Magaliesburg North West. The parcel was directed to the wrong address in Nelspruit Mpumahlanga. On Saturday 28 December I tried to find out where the parcel is and I was informed that the parcel is in Jhb on route to Rustenburg. On Monday 30 December I spoke to Thapelo in the Head Office and she informed me that the parcel is at the Rustenburg branch. She informed me that the parcel will be delivered on Monday 30 December. On 31 December I spoke again to the head office and they put me through to the Rustenburg branch. A lady there said that they have the parcel, but she will have to speak to her manager to get the parcel delivered. She phoned me back and at 11:26 and informed me then that they only received the parcel just before 10 after she initially said that they do have the parcel. She also informed me that they can only deliver the parcel on Thursday 2 January 2025. The head office dens me an e-mail and said the parcel will only be delivered on Friday the 3rd of January 2025. In the mean time my client is furious about their parcel and The Courier Guy just feels a **** about it. They have received their money, why should they care. My hand are tied and the I have a very unhappy client. I spend thousands of rand per month on parcels sending with courier Guy and have had a lot of trouble with them this last few month. Their attitude and lack of care is totally unacceptable.