Wrong contract

I’m so annoyed with Telkom really I have had it!! What exactly are you guys doing to improve on your services?? I purchased two phones with Telkom on the 29 of December 2016 not forgetting that when I bought those phones I was being billed for incorrect phones it took months for that issue to be resolved just when I thought my heart was at ease with Telkom when I called them early this year now 2018 i am told that the phones that I bought are only 10 months old??? How can my phones be 10 months old yet they were purchased on 2016??? Of which I have proof of purchase!!! I need this issue to be resolved Telkom can’t keep changing contracts you guys are breaching contracts and are so unprofessional customers call your call centers and we don’t get any help from there instead we are just send back and forth such incompetence!!!!!!