It’s pretty rare but it can happen. Catalogue companies may sometimes reduce a customers credit limit, this is often more than likely that they have received some information about you from the Credit Reference agencies or another organisation.
Are you keeping up with repayments elsewhere? If you have suddenly been unable to make repayments elsewhere it could be that the Catalogue company have acted to stop you getting into further debt.
Another problem could be that you are not using much of the credit available. From time to time Catalogue companies may want to reduce the risk they have by removing customers with a large credit limit who are not making use of it. This frees up credit to offer other customers
In all cases you can contact your Catalogue company who will explain why they are reducing the credit limit, if you don’t agree with their decision you can always appeal, doing this in email or writing is better than a telephone conversation as you will have a record of what you are both saying.
Remember, just like credit limit reductions, you credit limit could be reviewed again shortly and increased again. Sometimes you may feel there was no reason a credit limit should be reduced but none of us have a right to credit and there is usually a pretty good reason why a catalogue company is reducing a customers credit limit.