It normally takes decades to build a brand... It's the forgetting of the old truth that allows a person to accept a new truth. You need to allow enough time for this forgetting to take place
A laser is a weak source of energy. A laser takes [only] a few watts of energy and focuses them in a coherent stream of light. But with a laser, you can drill a hole in a diamond or wipe out cancer.
If you can build a powerful brand, you will have a powerful marketing program. If you CAN'T then all the advertising, fancy packaging, sales promotion and public relations in the world won't help you achieve your objective.
Successful brands get into the mind slowly. A blurb in a magazine. A mention in a newspaper. A comment from a friend. A display in a retail store. After a slow buildup, people become convinced that they have known about the brand forever.