Wrong Meter

Its been 4 months and we are being charged based on a wrong meter number. We have logged a query each time and we were given reference numbers ( ********** 147, ********** 392 and ********** 481) however nothing has been done to fix this error as yet. They do admit that they notice where the error is however nothing is being done to fix it. The wrong meter number is ********** 38. Please assist because payments that are being currently made reflect under this meter number.