CSOS - Terrible Service in shambles!!!

Following my review from 10 March 2021 regarding the CSOS and their terrible service, today I received a letter from them stating that they are closing my case because they have not received payment! I paid the requested amount on 27 January 2021 and sent through proof of payment on that day to the email specified. I was then asked for the proof of payment again on 13 February 2021 where they had acnowledged it and told me that my file will be allocated in due time. On 2 March 2021, they sent me an email to say they have received my proof of payment and my file will be allocated to a Case management officer. And today they email me with a closing letter to say that they have not received my payment????? Every month, by law, you take my money yet this place is in shambles and it takes them almost 2 months to allocate someone to my case and assist me???? What am I paying for every month if you cannot even help me?????????