Let's be clear.
You are claiming that none of the statutory notices issued by TfL (3 namely the PCN, Charge Certificate and Order for Recovery) was received by you, yes?
You are also claiming that you did not receive the Notice of Enforcement from the bailiff, yes?
Whose car has been clamped and where is it located? I ask because the car which was involved in the contravention was sold by you in Jan. 2025, therefore as you had not made contact with the bailiff they could only have clamped this different vehicle on your property on the assumption that it is your property. So, do you live in a property with a unique parking area or is it a shared facility?
IMO, the only way of getting the clamp quickly removed is to pay. This matter is procedural at present so pl don't go into the whys and wherefores of the contravention, these may be needed later, but not now. Paying has no effect on whether you would be successful in having matters reset to the original PCN, and therefore all payments refunded, but you must stop further escalation of the debt and the nuisance that the car's removal would cause.