WHERE IS MY ACCOUNT?

I was under debt review. Personal loan account handed over to SSDA. Payment arrangements made and payment made. Later I am told the account is no longer with SSDA, it is now with MBD. I phoned the number reflected on the sms, number does not exist. I phoned and spoke to a person who then gave me another number. Number also does not work. I have no idea how to contact them to make arrangements. I also don't know where to make payments on my credit card. Kindly assist. Thank you