No regard for customer service - Postnet Dundee

Around the 19th of September I started enquiring with Postnet Dundee to have a package that I sent there be sent back to its origination postnet in Gauteng. I was told by Postnet Dundee that they would send the required payment details to me via WhatsApp and these details were never received. More than a week later and several follow-ups to Postnet Dundee, I had to phone Postnet Head Office to try and get support from them, to have this package re-routed. Only once Postnet H/O made contact with Dundee on the 3rd of October, did I receive the message via WhatsApp on the 4th of October. Payment was immediately made and notification sent via my bank to Postnet Dundee to have the package sent. Additionally I downloaded the proof of payment and this was also sent to the number they had provided. Throughout this two week process, I emphasized that I had to get the package back by Friday the 7th of October. With this info on hand, Dundee said that they would have to wait for the mere R99 to clear to their account before that would send the parcel back. This I believe was pure malicious attempt at further delaying my parcel. Postnet Dundee has no regard for customer service and even less regard for keeping to the promises it made to me as a customer and I am sure to a code of conduct maintained as a Postnet company. I will never use their service again and I truly hope that there can be some kind of repercussions from Postnet H/O for this poor service!!!!