Unprofessionalism from SNOWMASTER

We had a customer that brought his SnoMaster Icemaker in that was faulty, we as a company provide that after sales service whereby we do send any SnoMater products back to SnoMaster if a client has any issues on the product, we have been doing business with SnoMaster for a long period and never had any issues untill now, as i was saying client brought his Ice Maker in WE AS OUTDOOR JUNCTION BOOKED WITH OUR COURIER AS IN THE PAST the pickup was made and dropped of at SnoMaster after a couple of days SnoMaster informed us the IceMaker is done so we booked our courier to collect so they did and the IceMaker were back at Outdoor Junction we informed the customer his IceMaker is ready for collection. The customer collected.....after a couple of days the customer called and said that the IceMaker is still not functioning and he was upset we then informed SnoMaster (all done via email)then on the 7th of May 2024 SnoMaster send us a mail informing us that THEY SNOMASTER WILL BOOK THEIR COURIER TO COLLECT THE ICEMAKER FROM US OUTDOOR JUNCTION.....then on the 10th of May 2024 the courier company called DPS LASER ARRIVED AT OUR PREMISES TO COLLECT THE ICEMAKER THE GENTLEMAN SHOWED US ON HIS PHONE THAT HE IS HERE TO COLLECT ON BEHALF OF SNOMASTER HE ISSUED US WITH A WAYBILL AFTER WE INSISTED ON A WAYBILL. WAYBILL NR ***....aftet two weeks we called SnoMaster to follow up on the status of repairs on the IceMaker were they informed us the are still waiting for the Icemaker we then started with our issues that They informed us that they will collect with their courier and we informed them the icemaker was collected they argued they did not recieved we called the courier DPS LASER THEY ASKED FOR PROOF OF WAYBILL WE MAILED IT THROUGH TO DOS LASER THY ARE NOT RESPONDING,SNOMASTER HAS THE ATTITUDE THAT ITS OUR PROBLEM WE MUST FOLLOW UP we have dine everything we could from our side these two companies SNOMASTER AND DPS LASER ARE RESPONSIBLE AND NEITHER ONE OF THEM WANTS TO TAKE RESPONSIBILITY A CLIENTS PRODUCT WAS COLLECTED AND NOW HE IS HOLDING US RESPONSIBLE