DECLARE @test TABLE(x VARCHAR(20));

INSERT INTO @test
SELECT '+91 (876) 098 6789' UNION ALL
SELECT '1-567-987-7655' UNION ALL
SELECT 'FR5-5105';
declare @n char(26) = '22233344455566677778889999'

;WITH Num1 (n) AS (SELECT 1 UNION ALL SELECT 1),
Num2 (n) AS (SELECT 1 FROM Num1 AS X, Num1 AS Y),
Num3 (n) AS (SELECT 1 FROM Num2 AS X, Num2 AS Y),
Num4 (n) AS (SELECT 1 FROM Num3 AS X, Num3 AS Y),
Nums (n) AS (SELECT ROW_NUMBER() OVER(ORDER BY n) FROM Num4),
Cleaner AS (
SELECT x, (SELECT CASE WHEN SUBSTRING(x, n, 1) LIKE '[A-Za-z]' Then SUBSTRING(@n, (ASCII(upper(SUBSTRING(x, n, 1)))-64),1)
                       WHEN SUBSTRING(x, n, 1) LIKE '[0-9]'
                       THEN SUBSTRING(x, n, 1)
                      ELSE ''
                  END + ''
           FROM Nums
           WHERE n <= LEN(x)
           FOR XML PATH('')) AS x_clean
FROM @test)
SELECT x, x_clean
FROM Cleaner;

/*
x                                              x_clean
+91 (876) 098 6789           918760986789
1-567-987-7655                 15679877655
FR5-5105                              3755105
*/