Account closure

I requested to end my two years contract with leisure books last year in October & I was advised that I needed to place my last order. I ordered children's book worth R37 including postage, I did not receive the book nor did they close my subscription as requested. <br> <br> Leisure books has been sending me collection emails & I told them timeously that I still have not received the book & I even escalated to Mr Viesser whom I believe is an accounts manager, advising him to follow up with SA post office considering the strike that commenced in September last year, that package could have been lost during the strike because the time they claim to have posted the book to me the strike was still on.<br> <br> They have not done anything instead the very same accounts manager is sending me threatening letters, they can hand over the damn account to their attorneys and we shall see what stupid attorney would hold me liable for something I did not receive. They don't even have proof of collection to prove that I received & signed for the package.<br> <br> How am I expected to pay for an item I did not receive? Please take me to court and the judge shall rule! I'm sick & fed up of leisure books threatening me!