Student loan went into someone else's account

I have been trying to get my student loan sorted for months as it somehow went into the wrong account (not belonging to me) same sort code but a different account number. Due to data protection act I can only see the last 3 numbers but they were entirely different. I have called up multiple times to try and get this sorted. First time they gave me a tracking number to take to my bank to get them to sort it out. After lots of to-ing and fro-ing between student finance and the bank. The bank finally told me they can't trace it that way and have no way to recall the money anyway. I then went back to student finance who were apparently doing a trace memo on the payment and to call back in a few weeks, I called again in a few weeks. There was no record of any trace memo being sent. So repeated. Meanwhile they told me to send them my correct bank details which I did, the second payment says the status is paid even though the bank details are now correct and I have received no payment. I am now considering legal action as they are being no help and I can't really think of anything else to do. Any help would be appreciated.

I have been trying to get my student loan sorted for months as it somehow went into the wrong account (not belonging to me) same sort code but a different account number. Due to data protection act I can only see the last 3 numbers but they were entirely different. I have called up multiple times to try and get this sorted. First time they gave me a tracking number to take to my bank to get them to sort it out. After lots of to-ing and fro-ing between student finance and the bank. The bank finally told me they can't trace it that way and have no way to recall the money anyway. I then went back to student finance who were apparently doing a trace memo on the payment and to call back in a few weeks, I called again in a few weeks. There was no record of any trace memo being sent. So repeated. Meanwhile they told me to send them my correct bank details which I did, the second payment says the status is paid even though the bank details are now correct and I have received no payment. I am now considering legal action as they are being no help and I can't really think of anything else to do. Any help would be appreciated.