No response and not keeping their promises

I joined your services as I retired late last year (2015) and was promised as I contracted with your company to handle my funds but I am disappointed and dissatisfied as I was supposed to receive my lumpsum on the 18th March 2016 but didn't receive,was also due to receive my monthly pay out but I am being told they made a mistake and captured that I fixed my funds for 5 years?they promised to get back to me and resolve the issue by the same Friday the 18th after I made multiple phone calls but still didn't get feedback from anyone? I find this very unacceptable and failer to honour what we contracted and agreed upon,I worked hard for many years to earn these funds and someone somewhere is disregarding my finances and not taking them serious. I need an urgent attention to this and a prompt delivery of agreed results or then let me know if you cannot handle to service me so I can immediately find someone else. I am very upset and inconvenienced by this as I have a family and commitments to honour.