Inventel — cobra coil

I recently purchased 2 of the cobra coil mobile phone dock stand upon opening the devices it was discovered that both devices were defective one unit would not charge the docked device, the other device would not allow mounting of the cobra head connection device upon checking the second drive it was discovered that the White tab inside the coil was missing. I am very dissatisfied with my product and since I wasn't able to produce a record of my purchase the store would not allow exchange or refund I would prefer a exchange over refund as I believe thedevice will be a great product to have and use.please email me back with solutions or suggestions. Thank you for your consideration. Sincerely Joseph Cole