You may need a new cartridge. Do you know what make the tap is? If you have any paperwork, there may be a service number for spares. The retailer may or may not be able to help.
If it's an unbranded Chinese tap, it can often be very difficult to source spares.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local