Vodacom Terrible

What is going on at Vodacom? I am a customar for more than 18 years and never miss a payment. I got 6 contracts current and my payment is 1850 pm untill last month when my debit order bounce because it was all of a sudden 2160 and I left 2000 in that account for the debit order. I call and find out that after 2 years on my tablet its not a topup account. I let it go and limit the data on the tablet, this month its even more. Again on the phone with customar care and no proper salution. I call 3 weeks ago and complain that I cant log in at my vodacom but again got referance numbers but nothing happend. I am going to move to another provider can you recommend witch one have a propper account dep. please.