Account department shocking

Where do I begin. My issue is with your accounting department. I have sent numerous emails, tried to phone numerous times and cannot get this resolved. I do not take it lightly in receiving a letter of demand especially if there is no reason for it. This letter of demand which I have tried to resolve threatens legal action. Please will you now proceed with legal action. I will then enter my appearance to defend, attach all my correspondence of proof of payments done and also attempts to correct your administration and then also I will pursue a cost order as going to court for this will waste my time and money. Stop wasting my time and proceed with summons. This platform is my last resort. Ref ***