Assupol policy Complaint

I have funeral covers at assupol for me and my family. Last year February I lost a family member and made a claim. It went well. As the time goes I experienced difficulties to get access to my client portal login. I wrote to them and sent emails with no success as there we no responses. One day a broker working with assupol visited my work place and I informed him about this, and immediately his facial impressions changed. He could face me. He then told me it might be because my policies are in arrears. I told him not, cause I made a stop order from day one, therefore it's not possible to miss payments to my premiums and it has been showing on my salary advice that premiums are paid every month. He helped me to login via his third party access. I then discovered that all my details and information are changed. Policies that I cancelled still exist and the deceased that I buried in March is a beneficiary. Dates of births are incorrect. I have been sending them emails to cancel all my policies but there is no response. I have written on their time line on Facebook then they delete or hide it to others. They have eventually asked me my contacts via inbox and vanished after. I really need to cancel my policies with them.