ZP purchase in UK

So I want to buy 100K zp which is $79.99 which is equal to £61.95 here in the UK. So I want to paysafecard however there are only 10£/£20/£50/£75 paysafecard vouchers available. This means I am forced to buy either 1 £50 voucher and another £20 voucher or a £75 voucher. There is no way of paying exactly £61.95 is there? Im forced to pay extra £20 for excessive zp that I don't need?.

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