Treated unfaily

I bought a Huawei device that comes with 10 Gig per month, i app**** on line because its convenient for me. Application was approved and the device was send to the Courierit to be delivered to me. It took almost two weeks for them to deliver until i followed up with Telkom. I was given a tracking number, i followed up and they said they couldn't get hold of me and i had never received an SMS or a call or voice message from them. Non there less, they promised to deliver the device by monday, monday when they got to my work place i was in a meeting. i asked the delivery guy to wait for me 10 minutes as i needed to print out mandatory documents. When i got to reception, the guy was not there, i phoned the courrierit explaining the story, i was told the guy will come back at 14:30 as i needed to leave for airport at 15:00. 14:30 they guy was not there, i phoned again then i was told he will come back the following day. I therefore explained to the courrierit that i will be out of town until thursday with work travel. Today when i call them, i get told the device was returned back to Telkom. I phoned Telkom and i get told, sorry we have cancelled your order and the special has ended end of November because the courrier guy didnt get hold of me. Why is TELKOM cancelling my order without notifying me and hearing my side of the story, i dont understand why they cancel my contract without even notifying me. I feel i was treated unfairly as a customer. We have a binded contract for 24 months and they cancel it without a valid reason. i suffer for applying on line which is suppose to be convinient and faster for me as oppose to going to the store. if Telkom has a right just to cancel the contract that i have agreement with them then it also gives me aright as a customer to cancel all my other contract with them. I have an ADSL and cellphone contract with them. I am not happy at all.