Struggling to get my contract cancelled!

These call centre agents affectively avoiding assisting me in cancelling my contract! I paid the cancel fee which means I have to call them back to proceed with the cancellation. 4 times in a row after calling the call gets disconnected while im talking to the agent! Whats worse is that I am not recieving any calls back after it disconnects! This is why I cancelled my contract in the first place! Poor customer service is an understatement!