Why am I not getting my full pension

For 3 months I have noticed that my full amount of my pension is not being paid in every time there is R200 deducted from my pension before it reaches my account and I don't understand why because the policy that I was in I stopped it because they increased the amount and I couldn't afford it anymore so I closed it because even if you stop it you lost all of that money you paid in you don't receive anything from it you lose all of it so now wen I stopped it I received the full amount of my pension money but after a few months I got to the ATM and before I with draw my pension I check on my balance and than I with draw my money so now I would like to know why and where is that money going and who said they can with take a R200 from my pension that can help me buy my bread milk and light for my home if you can please assist me with this I will be very greatfull thanks for your time