Md. Code, Commercial Law § 14–2403

(a) It is a deceptive trade practice for a sales agent to violate any requirement of this subtitle.

(b) If the sales agent violates any provision of this subtitle, the purchaser:

(1) May cancel the contract by notifying the seller in any manner, by any means, and at any time of the purchaser’s intention to cancel; and

(2) Is entitled to a refund of:

(i) All money paid; and

(ii) Until the refund is made, interest of 1% for each month after the date of cancellation.