Is there a senior person within ebay customer service who I can complain to directly

[srpa79]

Is there an email address for a senior person in ebay customer services who I can write to 

[ruby*tuesday]

No there is No Complaints Department you can write to the London  Office. The Address is in the User Agreement at the very foot of the Page.

If you had a problem with your Bike Sale. You can ask on here. Plenty of Experienced Responders to help.