Bad Services and Incompentant

My husband account was handover to MBD collections, i have phone them and got a settlement amount that i have paid on the same day, 07.09.2015, i have sent my proof of payment. When i have tried to get a settlement letter they told me that they never received my payment. On the 09.10.2015 i have sent it to Sarah and she told me that she will phone me back. NEVER HAPPEN so i phoned back the call was disconnected 4 times, before someone told me they did not received my mail. Then i fax it to *** just to be told they can't attend to the fax because the Manager is not there. I email it again to Lerato and she did not received it. The attitude of the agents is shocking.