Cash deposit complain

I was sent to deposit money into my husband,s account,which had to be paid inside the bank.I had the slip with the account number on it.The amount was R3200.I did not check the slip when I was finished. Only to be told by my husband that they called him as he had made a short payment of what he was supposed to pay ,that's when I checked the slip.I went to the bank the next day after he had received the call.The team leader by the name of Landen Wetzel took the slips I had nd made a copy of them .He told me they will check the footage of that day.I was phoned after a day by someone that I should write an email to her as Landen will not be at work until the 15th of December. What amazes me is that,obviously they did check the footage of that day,and they know what the outcome was,obviously they know if the teller was over with that amount or not.Why should I write an email whereas I went there,I expected them to tell me if they got the money or not.What happens to people who doesn't have access to emails, because what I realized is that I made a mistake by not checking my slip that time,and the teller also must have made an honest error because she was looking at the previous slip for an account number and that previous slip was for R2500 which she rang.I expected standard bank to phone me and tell me they got the R700 or not because I had to pay another R700 out of my pocket to balance the account money I was sent to pay.I know very well that I gave the teller R3200.I want standard bank to give me back my R700 and not tell me to write emails because the 1st time I went to the branch they did not tell me about emails.