iPhone 6

Good day, I have purchased an iphone 6 from the Telkom branch in the Hatfield Plaza, not even 2 years ago. According my understanding, the phone is still under warranty, as I took out a 24 month contract. I took out insurance on this phone. I am currently working abroad and is visiting the country, on vacation. This phone has been giving me problems since 23/12/2017. Due to all the public holidays I took the device into the store on 27/12/2017 and I was told that they need a copy of the contract and a slip. I searched and couldn't get hold of any documents as everything is done electronically. I went back today and was given the number of the insurance company as Telkom does not have anything to do with this device. I will be leaving the country on 04/01/2018 without a proper phone and still an installment and insurance that will be deducted on a monthly basis. Please note, it's the Telkom store next to Rage, opposite the Biltong store and Pick nd Pay Clothing Store. What am I to do...???.