Hi,
The only way to confirm if you are being charged VAT is to contact the supplier.
If the overseas supplier is selling goods to you in the UK below a value of £135 and you are VAT registered, then the overseas supplier will not charge you VAT. They will instead ask you to account for the sale under the reverse charge procedure.
This involves you accounting for the VAT on your return,where the inputs match the outputs and you are essentially just accounting for the VAT but not paying anything over to HMRC.
Reverse charge is normally used only for services supplied from overseas but is used for goods in this scenario.
You can find guidance on how reverse charge is accounted for on the VAT return here
Place of supply of services (VAT Notice 741A)
Thank you.