How long should equipment return take?

I recently cancelled my VM account and had to return the equipment (two V6s, a Hub 5 and 2 Wi-Fi pods), I dropped it off at the drop off point on the 26th, it is shown as processed at the Yodel National Hub on the 29th April and has not moved since (so over a week now).

I have over £50 in account credit which I do not believe will be processed for return to me until the equipment is received, is that correct? I am also concerned about being charged for the kit (as there's quite a lot of it), though I would assume as I have dropped it off that, that should be OK (I did also take photos of the kit before packing it and once it was packed in the box).

As an extra complication I also received a second set of smaller return packaging a few days after I sent off the equipment, so I don't know if some items were expected to be sent separately. The first box was big enough for all the equipment (just), but the second one wouldn't have been.