No longer Afford it want to remain with one line

Since the 10th of November 2014 requesting Telkom to cancel my switchboard line as Company is no longer doing well actually it never did well, we assumed to have lots of calls but we are not receiving volumes so we thought of cutting expenses as we paying almost R5600.00 every month due to expensive switchboard rental whereas we making limited calls so the only thing that is killing us is switchboard rental fee, So we have been sending emails to Telkom requesting for cancellation and even went to the branch whereby we where told we need to give one month notice that's when cancellation can take place we made one month notice which was on the 10 of December 2014 but even today no technician who came to cancel instead on the 10 January2015 I received demand letter requesting R3432.09 PAYMENT HOW ON EARTH MUST I PAY THIS RIDICULOUS AMOUNT AND WHERE TO GET THAT AMOUNT BECAUSE WE HAVE EXPLAINED OURSELVES THAT WE NEED CANCELLATION DUE TO THE LACK OF FUNDS AND AFFODABILITY.