i want to cancel this contract

On Wednesday i received a device that I ordered online and went to the store for them to help me keep my prepaid number. It is Sunday and i still cannot use my number. I have spoken to more than 10 people reporting this issue. I have been to the store more than 3 times. Currently my prepaid number no longer exists and am told it needs to be recycled by a department that does not work over weekends. When that department recycles my number, it will take another 48 hours. This means for 7 days i will not be able to use my number and no one from telkom is able to help me. I am still well within my rights totake this device back and go elsewhere to gwt another one. I am sock of calling and calling and going to the mall every day.... really upsetting!!!!! :((((