Simple Delivery Disaster - Package heavier than prepaid label

[dombr-julia]

My item: https://www.ebay.co.uk/itm/177146651250
item number: 177146651250

After being boxed up is just over 3kg.
The useless Simple Delivery label is up to 2kg and will charge the buyer £3.71
If I refund the stupid simple delivery label, it refunds the  buyer, not me.
So either way, I will pay more than double for the delivery, what the F do I do ?

Does ebay realise that people don't fukn pack items before listing them in case it doesnt sell for weeks ?
Once packed it is heavier and might no longer suit the label, which is why paying for a label in advanced is *bleep*ing *bleep*.

What do  I do now ?

[sml192]

Provided the item is still within the maximum weight and dimensions for the carrier then you can still use the supplied label and it will be accepted at no additional cost to you or your buyer:

'If you use the recommended parcel size and your item exceeds the maximum size and weight of the label, you won’t be charged any additional costs. Just go ahead and use the Simple Delivery postage label. The courier will accept your package providing it remains within the maximum weight and dimensions for the service.'