Bad Service

I called them to cancel my policy and they informed me to write a 30 days notice and send it to them, I did and requested for my agreement copy. To my surprise, the premium was amended, there was an increase for my April and May premiums. I had already paid the April premium and I didn't notice. I sent my 30 days notice cancellation letter and requested for elaboration on the amendment, they didn't respond until I called them. I spoke to Bianca from Anderson insurance underwriters who told me that me and KIA insurance broker approved it. I called KIA broker and spoke to Anathi, who didn't know about it. Later on Bianca called me to tell me that it was an error from Anderson. I requested that they cancel my insurance with them with immediate effect as I don't want another "error" and mistake to happen in my premium again. They refused. Merriam wrote to me, "Kindly note Bianca acknowledged that error was made and then it was corrected." How was it corrected, when I didn't get my refund for the increased premium I paid in April? I have never claimed with Anderson for them to just increase premiums as they please, of which to my knowledge premium amended are communicated . This is a clear indication that, should there be a claim it would probably be hell for one to be served to satisfaction not to mention to be paid. They are refusing to cancel my insurance, saying I sign for terms and conditions. Seemingly, they can give you bad service all they like and amend your insurance premiums whenever and you as a client must abide by what you signed for. Well I would rather not have an insurance if Anderson is the only one available! From now on to my knowledge as from the 01/05/2016 I'm no longer with Anderson and all their debit orders will be reversed because they don't want to cancel my insurance and I'm going to an insurance that will take my concerns and queries at heart.