Can companies stop using fastway to save buyers the hassle

I agree with every bad review given about this “courier” company over the past few months, especially the bad customer service. I emailed the Pretoria branch and since then it has gotten worse. Whenever I order from a company and see that they use fastway, I ask them if I can make my own arrangements with Courier Guy instead, irrespective of the costs, otherwise get ready for a headache from day 1 or never getting your parcel or being met with rude people.