Wrong amount on statement for final payment

I Bought a stand in Botrivier, just to discover it was way overpriced and over valued by the municipality. After selling it at last for R25 000, after buying it for R198 000, just to get rid of it and the municipality bill every month, the municipality bill kept on coming. Then I didn't receive any bills for months , so I thought at last they discovered that there's a new owner, ( I contacted the attorneys that handled the case also) just to receive all at once. The Post Office's strike was the reason. I contacted them sever all times, promises that they will contact me back, and again and again. At last I contacted the attorneys that handled the case again. At last the feedback was that they are sorry, they changed to a new system and they made a mistake with the final statement, so I must pay another R612. They made the mistake, no one contacted me to explain. I had to have months of trouble and costs to find out what's the problem. The attorneys: Vorster and Steyn in Hermanus also just ignored my last e-mail to them. They had there money, don't worry about mine. I've paid the municipality a total of R615 just now, to prevent another bill for rent of maybe R3.