Problem with Sadmg

Hi Hello Peter, Please may you help me, In 2018 I joint Debt review with Sadmg and after noticing that they were just deducting my money and not paying my accounts in 2019 I canselled with them and they paid me back after I reported them here. Now my problem is that I have find out that they did not deregister me from their company and I cannot finish some of my debits because of them. Please may you help me find the canselation letter from them because everytime I call them there is now no response.