delaying of feed back

On the 7th of Nov 2015 ***** was done on my Vodacom Mpeasa account, And money (R2500) was taken on my account with out my acknowledgement .I was then told to Email documentations for investigation purposes of which I did. I was then promised by Mpumi ( Mpesa call centre consultant) to get feed back from the I.T department in less by two weeks of which three months has passed with out any phone call or any form of communication and all the time when I give the department a call I am being promised lies and I never get enough explanation as to why is the process taking so long .I am totally disappointed by the network it self I even change to a different network because its not fear to support Vodacom yet some part of its network fail to do their jobs on time. May it be that I get my money back on time as promised