Inept staff and systems

I changed my bank account from a Platinum account to Gold,due to the poor service received by FNB staff.Thereafter I have been unable to use my gold cheque card to make any online purchases as the card has been flagged as being used *****elently.As I am no longer a platinum card holder,I am unable make use of that resolution centre.I contacted the complaints and compliments department,who was unable to assist me and sent me from pillar to post,with no one being able to assist me.Thereafter I called back and lodged another complaint,where I was informed that a person by the name of Vuyo Maphanga would make contact.Vuyo did call,but I was unable to take the call.She/He sent me an email,to which I have responded and requested an update as to how long this issue would take to resolve.As to which I have not heard anything and I contacted the Premier resolution centre,where no one was able to put me into contact with this Vuyo person.As it stands my card still doesnt work for any online purchases I try to make and I still have not been provided any details as to the resolution of this issue.