Refund all premiums since inception

I have a funeral plan with atlas finance from 2010 and every month since , i'v made sure that my premium were paid in due time . two years after paying the policy i learned that the information i received at sale stage was contradicting to what was on the ducuments . last year they did a double debit saying i fid not pay my policies . i told them i get paid on the 20th each month and my debit day is the 20th , i had to email my bank statement providing full proof that they debit me . now in January 2016 i was not debited yet again i had to call in and ask why i was not debited and i was told the debit will go off on the 28 in which it did went off but was double debit again which again not what suppose to have happend and i dont understand . i have never received any form of communication from them . what is worse is that they never feedback me until i do and its costly on my side