Inserting column in mysql database table and after doing the update in the same column created

Question

I’m developing a system:

1- The "USER" of the system registers a service for a particular client who contracted that service.
2- This registration is done via a form.php...
3- Send this data directly to a SCRIPT.PHP and automatically create a column in the client table referencing the service the client hired.
4- With this, each registered customer will have one or several services registered in the bank in its client table.

Come on! What’s going on... I can make an ALTER TABLE in the client table and I can create the column of the "contracted service"... But I cannot automatically insert the text related to the service in the column of the "contracted service" for each client... Follows the code..

// DADOS vindo do form
$ID_CLIENTE_ACB = trim($_POST['ID_CLIENTE_ACB']);
$servicos = $_POST['campoServico'];
$servicosAdd = implode($servicos);
// --------------------------------

$servicosAdd = str_replace(" ", "_", $servicosAdd);

//Tirando os acentos dos serviços para criar a COLUNA no BANCO MYSQL
function tirarAcentos($servicosAdd){

    return preg_replace(array("/(á|à|ã|â|ä)/","/(Á|À|Ã|Â|Ä)/","/(é|è|ê|ë)/","/(É|È|Ê|Ë)/","/(í|ì|î|ï)/","/(Í|Ì|Î|Ï)/","/(ó|ò|õ|ô|ö)/","/(Ó|Ò|Õ|Ô|Ö)/","/(ú|ù|û|ü)/","/(Ú|Ù|Û|Ü)/","/(ñ)/","/(Ñ)/"),explode(" ","a A e E i I o O u U n N"),$servicosAdd);
}

$servicosAdd = tirarAcentos($servicosAdd);
$servicosAddM = strtoupper($servicosAdd);

//ALTERAR TABELA BANCO DE DADOS MYSQL()
$alterTableSql = "ALTER TABLE cad_cadastro_cliente_acb ADD SERV_".$servicosAddM." VARCHAR(40)";
$usuario_conect = mysqli_query($connect, $alterTableSql);

//INSERIR SERVIÇO NA TABELA CRIADA
$UpdateSql = "UPDATE cad_cadastro_cliente_acb SET SERV_$servicosAddM= $servicosAdd WHERE ID_CLIENTE_ACB = $ID_CLIENTE_ACB";

$usuario_conect = mysqli_query($connect, $UpdateSql);

echo"<script language='javascript' type='text/javascript'>
alert('Serviço Cadastrado com sucesso!');
window.history.back();
</script>";
die();

mysqli_close ($usuario_conect);

Thank you and I need help !!! kkkk