ZERO customer service

We bought timeshare at the Vacation Club last year. Till date, only few debit orders went off for the correct amount (not my fault if they dont send the instruction or the correct instruction). Every time we call in to either make a booking or change our booking we get the response that our account is locked due to non payment of levies, I then have to EFT over the outstanding levies. This has now happened twice. Every time I ask why the levy debit orders arent being deducted correctly I dont receive an answer. Now, our timeshare dates falls within the national lock down and the last day to change it is today (we're scared we'll lose the option to bank it now). I made the payment last night, but obviously it hasnt cleared and sent proof to Letisha, but she says their records doesnt reflect anything. Why is it so easy to buy timeshare but its a mission to get help from you?!? Why cant a place like Sun International not send through debit order instructions for the correct amount?!? Why is there no customer service?!?