Think i have managed to get some help with this, after over one month of hitting a brick wall.
The product dimensions on my listing were changed ‘by someone’, about 3 weeks after the item arrived at the Tilbury warehouse.
When the item was first shipped into Tilbury the FBA fees were OK, but I queried the weight of the item and Seller support opened a case. My Helium 10 tool noticed that someone has made an update to my the dimensions in the listing and the FBA fee jumped by almost and extra £2.00 !
I now have to sell a plastic toilet brush for £7.97 and I pay a massive FBA fee of £6.02 inc taxes. So my final payout is only £1.95, when before it was around £.4.01 !!
Luckily the agent also noticed that someone had tampered with my listing about 3 weeks after it arrived in the warehouse and she is trying to help me fix the FBA fee issue and obtain a refund for about 60 items that have been sold with excessive fees.
I had to give her a sales order number from when the FBA fees were normal and then another sales order number with the excessive fees. Only then, could she help me out and escalate the issue.
Watch this space …