Bad Service and Experience

I am writing this email to express my deep disappointment and frustration regarding the recent experience I had with your company. I believe it is important to bring this matter to your attention in the hope that it can be resolved promptly and to prevent similar issues from recurring in the future. Please note that the agreed deduction date was the 15th of every month. I was surprised when I check my statement that your company went to my bank on the 12th of January without my consent and as a result of that I incurred bank charges. Despite my initial expectations and previous positive experiences with your company, this incident has left me extremely dissatisfied with the level of service and quality provided.