A thoughtful and heartfelt gift to express your apologies to Tattva Wellness Spa could be a spa gift basket. Fill it with luxurious bath and body products, scented candles, and a handwritten note expressing your sincere apologies. Include a gift certificate for a spa treatment or massage to show your commitment to making amends. Additionally, consider a personalized item, such as a monogrammed robe or a custom spa kit, to add a special touch. The aim is to demonstrate your regret and desire to make things right while offering a token of relaxation and self-care.