Synchrony Financial Credit Card Complaint

Synchrony Financial Credit card department,

Closing/Cancelling account New Hampshire

I have sams club master card.I have - stores and all seperate sams club master card.Every week we buy from sams club and pay off.I have $15000.00 credit limit and every week I buy more than $12000.00 cigarettes and grocery for my store. Synchrony bank said every week you are paying is unusual payment activity and they close my all three account and he fortified my more than $7000.00 rewards, I called couple of time he said open new account, I said I dont want to open new account because may be you close account again and you fortified my rewards, I told sams club manager -, - and he tried to open my account but Synchrony bank said no more rewards, so If they closing my account I have no problems but I need my rewards back because it is allmost $7000.00