1. Open a swissquote
account. Transfer the money into your EUR account with them. Make an exchange into CHF on their online platform. Transfer the money out into your reference account.
Cost: 0.45% spread (i.e EUR68) to trade and maybe small fee CHF2.- or so to transfer the money out.
2. Use one of the many online FX platforms, involves the same kind of mechanism. Names I am aware of include: transferwise, currencyfair and fairfx.