Sending 4 items back to same seller and eBay asking for me to pay for postage x4

[TheGander]

I bought 5 pairs of trousers from an eBay seller specialising in second hand clothes. Only 1 pair fits well. I went to start return process and eBay is asking for 4 sets of postage fees even though it’s all going into 1 parcel. Is there anything I can do to prevent this and just pay for postage once? Thanks!

Can you phone ebay still? That was how I solved my last problem

Thank you , I did. The agent told me to just put 1 item through, get a tracking number and use that for the other 3 items, but the website does not allow me to do that. I have contacted the seller.