hi, I purchased two sets of 9V batteries, Reference P252373550 and P252373532, from Seller https://www.trademe.co.nz/a/member/58860 . The second item was supposed to require only an additional 50 cents for shipping, but $7.90 was withdrawn for each, so I contacted the seller. I was told that it would be processed by email on October 21 within a day, but it has not been processed yet, so I am requesting assistance to resolve it.