(1) Where a trader operates a telephone line for the purpose of consumers contacting the trader by telephone in relation to contracts entered into with the trader, a consumer contacting the trader must not be bound to pay more than the basic rate.

(2) If in those circumstances a consumer who contacts a trader in relation to a contract is bound to pay more than the basic rate, the contract is to be treated as providing for the trader to pay to the consumer any amount by which the charge paid by the consumer for the call is more than the basic rate.