Hi I have the MAR-372 | X-LARGE HEAVY DUTY FREESTA...

Hi I have the MAR-372 | X-LARGE HEAVY DUTY FREESTANDING PUNCH Bag, there are 3 parts the base the bit you punch and a big hollow plastic bit that you push through the bottom of the base then the main bit slots between that and the base.... Only it doesn't it'll fit when empty but once you fill with sand the bit that goes through the bottom doesn't fit at all.
I've tried everything but nothing doing I contacted the seller whom I'm reviewing but they ignore your emails so no repeat custom from me will be forthcoming I'd avoid like the plague.