Worst Courier Company ever with rude staff

I put my return in on 26 of August. On the 28th of August the courier whatsapped me to ask my address or location. I sent it to him location. He then said he had to allocate it to a different courier.

I phoned the 30th to confirm the delivery and the call centre agent confirmed that the courier will come collect and he never did.

I phoned on the 2nd and complained about the fact that no one came to collect the package and the call centre agent said that the address was only updated on Monday. So someone will contact me to come and collect the package. She said that she will escalate it. She was very cheeky and rude might I add.

Today I phone (04 September) they still don't have the complete address. Mind you, on the TEMU app I can see the full address, but Buffalo don't have it. Also it was delivered to me fine by Fast Forward, but Buffalo having issues.

Gandi the agent tells me that she will escalate it. I said it's already been escalated, I want to speak to the manager. Again today the manager is in a meeting. I ask her for the managers number and she says she does not have it. Ask her for her name and surname and the agent tells me she only knows her managers name not her surname. Eda or something. No contact details. This is ridiculous. I've emailed them and no reply.

This is the worst experience I've received from a courier company. I want someone to contact me to arrange for them to pick up my package.