I have used them for years, they have an amazing service!
They do however have to forward items which are over the allowed import amount and need a tax..... They are forwarded to the offices next to the huge obi garden centre in tiengen once you hit the roundabout you will see the offices right there, you must go in past almost like a tower reception entrance as it's mostly for trucks etc .... Go in to the car park and the offices in front of you are where u need to go.... You should be ok without your german as the lady I saw spoke perfect English, pay the tax then leave with your parcel...... You maybe should quiery the tax If she does speak English as here medical items are exempt from tax ( so next time you could send it here ) but if not I suggest you pay and next time send it here
I use them regulary for Amazon.... Parcels in general