Disrespectful attitude towards clients.

My package was supposed to be picked up on Monday 1st December but I got a message saying my package wasn't ready, then Tuesday same story so I phoned to find out what was going on, i get asked by Sello what must they do if the company doesn’t want to give the driver the package, so I phoned the company and the said they gave the wrong info and couldn't trace my package with the waybill the driver gave them, then they send me the waybill the driver gave them, and i dont know what was going on there it was handwritten and it was a mess so I phoned Sello again and he said they gave the correct info, and again gave me attitude. Wednesday they Finally pick up my package and it was delivered today friday 5th December. The treatment we get from the staff is very unprofessional and just plain disrespectful, i have send out dozen of emails to sort this problem out, where did they get the info from? Without my products I cant do my work. Every email gets escalated to specialized department but nothing happens after that. I've been using them for three years now, time to use a more reliable courier service.