Bv4800 pro lagging and freezing issues

Bought the 4800pro on the 18th of august and from minute one it had major problems Waited a weeek for them to organise the courier to pickup Was asked on Friday the 29th what is my bank account details and that i must note the refund will be facilitated through payfast Fast forward to the 3rd of September i phone to enquire how long the refund will take,upon enquiring i got told their accountant will process the refund on friday the 5th of September as they only do refunds on fridays Now i have my refund but minus the courier money it took to send their faulty device as they claim the courier is a service i paid for Anyway...id rather just stay away from Daleen and Blackview Sa Pooor pooor pathetic service