PAXI is unreliable and they got bad customer service

They are soooooo unreliable and their service is way too bad. They have delivery options, starting from R50 to R110. R50 option the parcel is suppose to be delivered in 7-9days. R100 5-7days then R110 in 3-5days. You pay R50 for a parcel to be delivered in 7-9days but it gets delivered in 2 days. You pay R100 for delivery in in 5-7days The parcel get delivered in 2 week. ?????How then do I tell my customers which amount to pay???. I call their customer care line n i will be on hold for 5minutes. My airtime got cut off the person who put me on hold won't bother to call back. The whole week will pass calling about one parcel but no help received. I spent over R300 in airtime enquiring about one parcel but didn't get help. I have to call Skynet myself to look up the parcel for me. My customer who is suppose to receive this parcel is throwing insults at me and threatening to shame me on Facebook and also asking for a refund. Still I don't know Whats happening with the parcel. I call the customer care line again they say the matter has been escalated, that's all they can say. I'm sooo disappointed at this service .