Ok how about this to the CEO? I know it sounds super desperate but lets call a spade a spade here, I am super desperate: Dear Sir, On 29th November 2023 I took out a loan of £5000 with you. Unfortunately very early into 2024 I found myself in financial difficulty (unexpected bills and two episodes of sickness and the tax office getting my tax code wrong resulting in less pay for two months) and I contacted you (MCB) on 13th February 2024 asking if there was any way I could extend the length of my loan to 36 months. I fully explained why I was requesting this and asked for your help. I did not receive a reply to that email so I again contacted you on 7th March 2024 to advise you of a change in my circumstances which resulted in me having to take out a DMP and asking you to confirm that the direct debit had been cancelled. You would have also received confirmation of this DMP from StepChange but you did not acknowledge receipt of my email. I have only managed to make one payment from my loan but did try and contact MCB to discuss extending my loan, help etc.  I have now therefore fallen behind on several of my debts, yours included, and as a result you have lodged a Cifas marker against my name for "evasion of payment", which has resulted in me having to change banks, which has been an extremely difficult process because of the Cifas marker. I do not feel you have been fair or given me the opportunity to fully explain my situation to you before you lodged the marker against my name. I appreciate it is a business and you have acted accordingly, but I did try to make contact to arrange alternative arrangements and at no point, not even to this day, did I ever intend to not repay my loan. I cannot stress to you enough how much this has affected my mental health. I am having trouble sleeping and my existing health condition has been exacerbated by all of this. What I would like you to do is to please, please remove the Cifas marker and let me make arrangements to pay the loan back through a DMP.  Please sir, I am begging for your help here. I am not a dishonest person and I have never been in a situation like this before. I am desperately trying to make things right but this marker is killing me. Please can you help me? I look forward to hearing from you. Yours faithfully,

Sorry  Noted x

Just be careful with your language on what you post here - Keep it above board Lets see what you send to the big boss. 

I made that payment on 13th Feb, then it all went down hill. 

Massive potentially that payment has been made in some form as accompanying evidence to your financial difficulties.  And yes, but add some more zing to the email if it goes to the CEO - You need to make them understand what they have done. And telling the CEO  / MD of the biz what their actions have done to you - It adds to the complaint weighting.