Refuse to unblock my credit card-sole trader

Retrenched claimed Ins. Sent MM email. Spoke to me by telephone-I called SARS & reply to me was that a \Sole Trader"ie MG Durandt t/a as Durandts Bookkeeping Services does not need a Registration No. I used to be a Provisional Tax Payer when my business was run full time and when I went back to being employed SARS advised me that I could submit my Balance Sheet and Income Statement once a year and complete an IT12 with my Employer's IRP 5 together with my sole trader Financials and did not have to pay Provisional Tax. I have always kept my books up to date even though a smaller amount came through the business in both Cheques and Cash-Did not bank all the Cash but reflected in my Financials. For the Tax year end Feb 2015 as I was employed util the middle of June 2014 and recieved an Income via Durandts Bookkeeping Services for the rest of the year I do not have to pay Provisional Tax. However"