DENIED CREDIT LIMIT INCREASE

I have an account with RCS groups for more than a year and being very happy but recently when I tried to increase my limit increase they tell me its declined without no good reason as they tell that its low scoring but fact is I pay my accounts very well and on time every month. All my accounts with RCS group are always up to date the only thing I needed was a limit increase on RCS card.<br> <br> Can someone please look into this and get back to as soon as possible plea