It depends on the wall behind the tiles. if it is a plasterboard (drywall); then I would advice you remove the plaster wall and install a brand new one. It does not cost much.
Otherwise if it is masonry wall; then you will have to use force to remove the tiles; and then remove the adhesive with a knife.
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