What was the last estimated date of delivery on both items?
it seems a bit harsh returning both items you only ordered a week ago ( well the first item you mention a date) if the seller had for example a 2 day dispatch time and sent the item tracked 48 for example, in theory the earliest they would have been with you could be Thursday/Friday. You don’t know if the item was delayed in transit?
I presume you sourced the tape elsewhere as you don’t have any if returning both, Which begs the question why order it from this seller in the first place?
depending on my first question theoretically it’s a remourse return and you should cover postage costs for the return.